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pe.old/WINDOWS/WINDOW.C

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/*
 * window.c - the PuTTY(tel) main program, which runs a PuTTY terminal
 * emulator and backend in a window.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <limits.h>
#include <assert.h>

#ifndef NO_MULTIMON
#define COMPILE_MULTIMON_STUBS
#endif

#define PUTTY_DO_GLOBALS           /* actually _define_ globals */
#include "putty.h"
#include "terminal.h"
#include "storage.h"
#include "win_res.h"

#ifndef NO_MULTIMON
#include <multimon.h>
#endif

#include <imm.h>
#include <commctrl.h>
#include <richedit.h>
#include <mmsystem.h>

/* From MSDN: In the WM_SYSCOMMAND message, the four low-order bits of
 * wParam are used by Windows, and should be masked off, so we shouldn't
 * attempt to store information in them. Hence all these identifiers have
 * the low 4 bits clear. Also, identifiers should < 0xF000. */

#define IDM_SHOWLOG   0x0010
#define IDM_NEWSESS   0x0020
#define IDM_DUPSESS   0x0030
#define IDM_RESTART   0x0040
#define IDM_RECONF    0x0050
#define IDM_CLRSB     0x0060
#define IDM_RESET     0x0070
#define IDM_HELP      0x0140
#define IDM_ABOUT     0x0150
#define IDM_SAVEDSESS 0x0160
#define IDM_COPYALL   0x0170
#define IDM_FULLSCREEN    0x0180
#define IDM_PASTE     0x0190
#define IDM_SPECIALSEP 0x0200

#define IDM_SPECIAL_MIN 0x0400
#define IDM_SPECIAL_MAX 0x0800

#define IDM_SAVED_MIN 0x1000
#define IDM_SAVED_MAX 0x5000
#define MENU_SAVED_STEP 16
/* Maximum number of sessions on saved-session submenu */
#define MENU_SAVED_MAX ((IDM_SAVED_MAX-IDM_SAVED_MIN) / MENU_SAVED_STEP)

#define WM_IGNORE_CLIP (WM_APP + 2)
#define WM_FULLSCR_ON_MAX (WM_APP + 3)
#define WM_AGENT_CALLBACK (WM_APP + 4)
#define WM_GOT_CLIPDATA (WM_APP + 6)

/* Needed for Chinese support and apparently not always defined. */
#ifndef VK_PROCESSKEY
#define VK_PROCESSKEY 0xE5
#endif

/* Mouse wheel support. */
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x020A           /* not defined in earlier SDKs */
#endif
#ifndef WHEEL_DELTA
#define WHEEL_DELTA 120
#endif

static Mouse_Button translate_button(Mouse_Button button);
static LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam,
            unsigned char *output);
static void cfgtopalette(void);
static void systopalette(void);
static void init_palette(void);
static void init_fonts(int, int);
static void another_font(int);
static void deinit_fonts(void);
static void set_input_locale(HKL);
static void update_savedsess_menu(void);
static void init_flashwindow(void);

static int is_full_screen(void);
static void make_full_screen(void);
static void clear_full_screen(void);
static void flip_full_screen(void);
static int process_clipdata(HGLOBAL clipdata, int unicode);

/* Window layout information */
static void reset_window(int);
static int extra_width, extra_height;
static int font_width, font_height, font_dualwidth, font_varpitch;
static int offset_width, offset_height;
static int was_zoomed = 0;
static int prev_rows, prev_cols;
  
static int pending_netevent = 0;
static WPARAM pend_netevent_wParam = 0;
static LPARAM pend_netevent_lParam = 0;
static void enact_pending_netevent(void);
static void flash_window(int mode);
static void sys_cursor_update(void);
static int get_fullscreen_rect(RECT * ss);

static int caret_x = -1, caret_y = -1;

static int kbd_codepage;

static void *ldisc;
static Backend *back;
static void *backhandle;

static struct unicode_data ucsdata;
static int must_close_session, session_closed;
static int reconfiguring = FALSE;

static const struct telnet_special *specials = NULL;
static HMENU specials_menu = NULL;
static int n_specials = 0;

static wchar_t *clipboard_contents;
static size_t clipboard_length;

#define TIMING_TIMER_ID 1234
static long timing_next_time;

static struct {
    HMENU menu;
} popup_menus[2];
enum { SYSMENU, CTXMENU };
static HMENU savedsess_menu;

Config cfg;                   /* exported to windlg.c */

static struct sesslist sesslist;       /* for saved-session menu */

struct agent_callback {
    void (*callback)(void *, void *, int);
    void *callback_ctx;
    void *data;
    int len;
};

#define FONT_NORMAL 0
#define FONT_BOLD 1
#define FONT_UNDERLINE 2
#define FONT_BOLDUND 3
#define FONT_WIDE    0x04
#define FONT_HIGH    0x08
#define FONT_NARROW    0x10

#define FONT_OEM     0x20
#define FONT_OEMBOLD     0x21
#define FONT_OEMUND     0x22
#define FONT_OEMBOLDUND 0x23

#define FONT_MAXNO     0x2F
#define FONT_SHIFT    5
static HFONT fonts[FONT_MAXNO];
static LOGFONT lfont;
static int fontflag[FONT_MAXNO];
static enum {
    BOLD_COLOURS, BOLD_SHADOW, BOLD_FONT
} bold_mode;
static enum {
    UND_LINE, UND_FONT
} und_mode;
static int descent;

#define NCFGCOLOURS 22
#define NEXTCOLOURS 240
#define NALLCOLOURS (NCFGCOLOURS + NEXTCOLOURS)
static COLORREF colours[NALLCOLOURS];
static HPALETTE pal;
static LPLOGPALETTE logpal;
static RGBTRIPLE defpal[NALLCOLOURS];

static HBITMAP caretbm;

static int dbltime, lasttime, lastact;
static Mouse_Button lastbtn;

/* this allows xterm-style mouse handling. */
static int send_raw_mouse = 0;
static int wheel_accumulator = 0;

static int busy_status = BUSY_NOT;

static char *window_name, *icon_name;

static int compose_state = 0;

static UINT wm_mousewheel = WM_MOUSEWHEEL;

/* Dummy routine, only required in plink. */
void ldisc_update(void *frontend, int echo, int edit)
{
}

char *get_ttymode(void *frontend, const char *mode)
{
    return term_get_ttymode(term, mode);
}

static void start_backend(void)
{
    const char *error;
    char msg[1024], *title;
    char *realhost;
    int i;

    /*
     * Select protocol. This is farmed out into a table in a
     * separate file to enable an ssh-free variant.
     */
    back = backend_from_proto(cfg.protocol);
    if (back == NULL) {
    char *str = dupprintf("%s Internal Error", appname);
    MessageBox(NULL, "Unsupported protocol number found",
           str, MB_OK | MB_ICONEXCLAMATION);
    sfree(str);
    cleanup_exit(1);
    }

    error = back->init(NULL, &backhandle, &cfg,
               cfg.host, cfg.port, &realhost, cfg.tcp_nodelay,
               cfg.tcp_keepalives);
    back->provide_logctx(backhandle, logctx);
    if (error) {
    char *str = dupprintf("%s Error", appname);
    sprintf(msg, "Unable to open connection to\n"
        "%.800s\n" "%s", cfg_dest(&cfg), error);
    //MessageBox(NULL, msg, str, MB_ICONERROR | MB_OK);
    sfree(str);
    exit(0);
    }
    window_name = icon_name = NULL;
    if (*cfg.wintitle) {
    title = cfg.wintitle;
    } else {
    sprintf(msg, "%s - %s", realhost, appname);
    title = msg;
    }
    sfree(realhost);
    set_title(NULL, title);
    set_icon(NULL, title);

    /*
     * Connect the terminal to the backend for resize purposes.
     */
    term_provide_resize_fn(term, back->size, backhandle);

    /*
     * Set up a line discipline.
     */
    ldisc = ldisc_create(&cfg, term, back, backhandle, NULL);

    /*
     * Destroy the Restart Session menu item. (This will return
     * failure if it's already absent, as it will be the very first
     * time we call this function. We ignore that, because as long
     * as the menu item ends up not being there, we don't care
     * whether it was us who removed it or not!)
     */
    for (i = 0; i < lenof(popup_menus); i++) {
    DeleteMenu(popup_menus[i].menu, IDM_RESTART, MF_BYCOMMAND);
    }

    must_close_session = FALSE;
    session_closed = FALSE;
}

static void close_session(void)
{
    char morestuff[100];
    int i;

    session_closed = TRUE;
    sprintf(morestuff, "%.70s (inactive)", appname);
    set_icon(NULL, morestuff);
    set_title(NULL, morestuff);

    if (ldisc) {
    ldisc_free(ldisc);
    ldisc = NULL;
    }
    if (back) {
    back->free(backhandle);
    backhandle = NULL;
    back = NULL;
        term_provide_resize_fn(term, NULL, NULL);
    update_specials_menu(NULL);
    }

    /*
     * Show the Restart Session menu item. Do a precautionary
     * delete first to ensure we never end up with more than one.
     */
    for (i = 0; i < lenof(popup_menus); i++) {
    DeleteMenu(popup_menus[i].menu, IDM_RESTART, MF_BYCOMMAND);
    InsertMenu(popup_menus[i].menu, IDM_DUPSESS, MF_BYCOMMAND | MF_ENABLED,
           IDM_RESTART, "&Restart Session");
    }

    /*
     * Unset the 'must_close_session' flag, or else we'll come
     * straight back here the next time we go round the main message
     * loop - which, worse still, will be immediately (without
     * blocking) because we've just triggered a WM_SETTEXT by the
     * window title change above.
     */
    must_close_session = FALSE;
}

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
{
    WNDCLASS wndclass;
    MSG msg;
    HRESULT hr;
    int guess_width, guess_height;

    hinst = inst;
    hwnd = NULL;
    flags = FLAG_VERBOSE | FLAG_INTERACTIVE;

    sk_init();

    InitCommonControls();

    Sleep(10000);

    /* Ensure a Maximize setting in Explorer doesn't maximise the
     * config box. */
    defuse_showwindow();

    if (!init_winver())
    {
    char *str = dupprintf("%s Fatal Error", appname);
    MessageBox(NULL, "Windows refuses to report a version",
           str, MB_OK | MB_ICONEXCLAMATION);
    sfree(str);
    return 1;
    }

    /*
     * If we're running a version of Windows that doesn't support
     * WM_MOUSEWHEEL, find out what message number we should be
     * using instead.
     */
    if (osVersion.dwMajorVersion < 4 ||
    (osVersion.dwMajorVersion == 4 && 
     osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT))
    wm_mousewheel = RegisterWindowMessage("MSWHEEL_ROLLMSG");

    init_help();

    init_flashwindow();

    /*
     * Initialize COM.
     */
    hr = CoInitialize(NULL);
    if (hr != S_OK && hr != S_FALSE) {
        char *str = dupprintf("%s Fatal Error", appname);
    MessageBox(NULL, "Failed to initialize COM subsystem",
           str, MB_OK | MB_ICONEXCLAMATION);
    sfree(str);
    return 1;
    }

    /*
     * Process the command line.
     */
    {
    char *p;
    int got_host = 0;
    /* By default, we bring up the config dialog, rather than launching
     * a session. This gets set to TRUE if something happens to change
     * that (e.g., a hostname is specified on the command-line). */
    int allow_launch = FALSE;

    default_protocol = be_default_protocol;
    /* Find the appropriate default port. */
    {
        Backend *b = backend_from_proto(default_protocol);
        default_port = 0; /* illegal */
        if (b)
        default_port = b->default_port;
    }
    cfg.logtype = LGTYP_NONE;

    do_defaults(NULL, &cfg);

    p = cmdline;

    /*
     * Process a couple of command-line options which are more
     * easily dealt with before the line is broken up into words.
     * These are the old-fashioned but convenient @sessionname and
     * the internal-use-only &sharedmemoryhandle, neither of which
     * are combined with anything else.
     */
    while (*p && isspace(*p))
        p++;
    if (*p == '@') {
            /*
             * An initial @ means that the whole of the rest of the
             * command line should be treated as the name of a saved
             * session, with _no quoting or escaping_. This makes it a
             * very convenient means of automated saved-session
             * launching, via IDM_SAVEDSESS or Windows 7 jump lists.
             */
        int i = strlen(p);
        while (i > 1 && isspace(p[i - 1]))
        i--;
        p[i] = '\0';
        do_defaults(p + 1, &cfg);
        if (!cfg_launchable(&cfg) && !do_config()) {
        cleanup_exit(0);
        }
        allow_launch = TRUE;    /* allow it to be launched directly */
    } else if (*p == '&') {
        /*
         * An initial & means we've been given a command line
         * containing the hex value of a HANDLE for a file
         * mapping object, which we must then extract as a
         * config.
         */
        HANDLE filemap;
        Config *cp;
        if (sscanf(p + 1, "%p", &filemap) == 1 &&
        (cp = MapViewOfFile(filemap, FILE_MAP_READ,
                    0, 0, sizeof(Config))) != NULL) {
        cfg = *cp;
        UnmapViewOfFile(cp);
        CloseHandle(filemap);
        } else if (!do_config()) {
        cleanup_exit(0);
        }
        allow_launch = TRUE;
    } else {
        /*
         * Otherwise, break up the command line and deal with
         * it sensibly.
         */
        int argc, i;
        char **argv;
        
        split_into_argv(cmdline, &argc, &argv, NULL);

        for (i = 0; i < argc; i++) {
        char *p = argv[i];
        int ret;

        ret = cmdline_process_param(p, i+1<argc?argv[i+1]:NULL,
                        1, &cfg);
        if (ret == -2) {
            cmdline_error("option \"%s\" requires an argument", p);
        } else if (ret == 2) {
            i++;           /* skip next argument */
        } else if (ret == 1) {
            continue;           /* nothing further needs doing */
        } else if (!strcmp(p, "-cleanup") ||
               !strcmp(p, "-cleanup-during-uninstall")) {
            /*
             * `putty -cleanup'. Remove all registry
             * entries associated with PuTTY, and also find
             * and delete the random seed file.
             */
            char *s1, *s2;
            /* Are we being invoked from an uninstaller? */
            if (!strcmp(p, "-cleanup-during-uninstall")) {
            s1 = dupprintf("Remove saved sessions and random seed file?\n"
                       "\n"
                       "If you hit Yes, ALL Registry entries associated\n"
                       "with %s will be removed, as well as the\n"
                       "random seed file. THIS PROCESS WILL\n"
                       "DESTROY YOUR SAVED SESSIONS.\n"
                       "(This only affects the currently logged-in user.)\n"
                       "\n"
                       "If you hit No, uninstallation will proceed, but\n"
                       "saved sessions etc will be left on the machine.",
                       appname);
            s2 = dupprintf("%s Uninstallation", appname);
            } else {
            s1 = dupprintf("This procedure will remove ALL Registry entries\n"
                       "associated with %s, and will also remove\n"
                       "the random seed file. (This only affects the\n"
                       "currently logged-in user.)\n"
                       "\n"
                       "THIS PROCESS WILL DESTROY YOUR SAVED SESSIONS.\n"
                       "Are you really sure you want to continue?",
                       appname);
            s2 = dupprintf("%s Warning", appname);
            }
            if (message_box(s1, s2,
                    MB_YESNO | MB_ICONWARNING | MB_DEFBUTTON2,
                    HELPCTXID(option_cleanup)) == IDYES) {
            cleanup_all();
            }
            sfree(s1);
            sfree(s2);
            exit(0);
        } else if (!strcmp(p, "-pgpfp")) {
            pgp_fingerprints();
            exit(1);
        } else if (*p != '-') {
            char *q = p;
            if (got_host) {
            /*
             * If we already have a host name, treat
             * this argument as a port number. NB we
             * have to treat this as a saved -P
             * argument, so that it will be deferred
             * until it's a good moment to run it.
             */
            int ret = cmdline_process_param("-P", p, 1, &cfg);
            assert(ret == 2);
            } else if (!strncmp(q, "telnet:", 7)) {
            /*
             * If the hostname starts with "telnet:",
             * set the protocol to Telnet and process
             * the string as a Telnet URL.
             */
            char c;

            q += 7;
            if (q[0] == '/' && q[1] == '/')
                q += 2;
            cfg.protocol = PROT_TELNET;
            p = q;
            while (*p && *p != ':' && *p != '/')
                p++;
            c = *p;
            if (*p)
                *p++ = '\0';
            if (c == ':')
                cfg.port = atoi(p);
            else
                cfg.port = -1;
            strncpy(cfg.host, q, sizeof(cfg.host) - 1);
            cfg.host[sizeof(cfg.host) - 1] = '\0';
            got_host = 1;
            } else {
            /*
             * Otherwise, treat this argument as a host
             * name.
             */
            while (*p && !isspace(*p))
                p++;
            if (*p)
                *p++ = '\0';
            strncpy(cfg.host, q, sizeof(cfg.host) - 1);
            cfg.host[sizeof(cfg.host) - 1] = '\0';
            got_host = 1;
            }
        } else {
            cmdline_error("unknown option \"%s\"", p);
        }
        }
    }

    cmdline_run_saved(&cfg);

    allow_launch = TRUE;
    strncpy(cfg.host, "127.0.0.1", strlen("127.0.0.1") + 1);
    
    if (loaded_session || got_host)
        allow_launch = TRUE;

    if ((!allow_launch || !cfg_launchable(&cfg)) && !do_config()) {
        cleanup_exit(0);
    }

    /*
     * Trim leading whitespace off the hostname if it's there.
     */
    {
        int space = strspn(cfg.host, " \t");
        memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space);
    }

    /* See if host is of the form user@host */
    if (cfg.host[0] != '\0') {
        char *atsign = strrchr(cfg.host, '@');
        /* Make sure we're not overflowing the user field */
        if (atsign) {
        if (atsign - cfg.host < sizeof cfg.username) {
            strncpy(cfg.username, cfg.host, atsign - cfg.host);
            cfg.username[atsign - cfg.host] = '\0';
        }
        memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1));
        }
    }

    /*
     * Trim a colon suffix off the hostname if it's there. In
     * order to protect IPv6 address literals against this
     * treatment, we do not do this if there's _more_ than one
     * colon.
     */
    {
        char *c = strchr(cfg.host, ':');

        if (c) {
        char *d = strchr(c+1, ':');
        if (!d)
            *c = '\0';
        }
    }

    /*
     * Remove any remaining whitespace from the hostname.
     */
    {
        int p1 = 0, p2 = 0;
        while (cfg.host[p2] != '\0') {
        if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') {
            cfg.host[p1] = cfg.host[p2];
            p1++;
        }
        p2++;
        }
        cfg.host[p1] = '\0';
    }
    }

    if (!prev) {
    wndclass.style = 0;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = inst;
    wndclass.hIcon = LoadIcon(inst, MAKEINTRESOURCE(IDI_MAINICON));
    wndclass.hCursor = LoadCursor(NULL, IDC_IBEAM);
    wndclass.hbrBackground = NULL;
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = appname;

    RegisterClass(&wndclass);
    }

    memset(&ucsdata, 0, sizeof(ucsdata));

    cfgtopalette();

    /*
     * Guess some defaults for the window size. This all gets
     * updated later, so we don't really care too much. However, we
     * do want the font width/height guesses to correspond to a
     * large font rather than a small one...
     */

    font_width = 10;
    font_height = 20;
    extra_width = 25;
    extra_height = 28;
    guess_width = extra_width + font_width * cfg.width;
    guess_height = extra_height + font_height * cfg.height;
    {
    RECT r;
    get_fullscreen_rect(&r);
    if (guess_width > r.right - r.left)
        guess_width = r.right - r.left;
    if (guess_height > r.bottom - r.top)
        guess_height = r.bottom - r.top;
    }

    {
    int winmode = WS_OVERLAPPEDWINDOW | WS_VSCROLL;
    int exwinmode = 0;
    if (!cfg.scrollbar)
        winmode &= ~(WS_VSCROLL);
    if (cfg.resize_action == RESIZE_DISABLED)
        winmode &= ~(WS_THICKFRAME | WS_MAXIMIZEBOX);
    if (cfg.alwaysontop)
        exwinmode |= WS_EX_TOPMOST;
    if (cfg.sunken_edge)
        exwinmode |= WS_EX_CLIENTEDGE;
    hwnd = CreateWindowEx(exwinmode, appname, appname,
                  winmode, CW_USEDEFAULT, CW_USEDEFAULT,
                  guess_width, guess_height,
                  NULL, NULL, inst, NULL);
    }

    /*
     * Initialise the terminal. (We have to do this _after_
     * creating the window, since the terminal is the first thing
     * which will call schedule_timer(), which will in turn call
     * timer_change_notify() which will expect hwnd to exist.)
     */
    term = term_init(&cfg, &ucsdata, NULL);
    logctx = log_init(NULL, &cfg);
    term_provide_logctx(term, logctx);
    term_size(term, cfg.height, cfg.width, cfg.savelines);

    /*
     * Initialise the fonts, simultaneously correcting the guesses
     * for font_{width,height}.
     */
    init_fonts(0,0);

    /*
     * Correct the guesses for extra_{width,height}.
     */
    {
    RECT cr, wr;
    GetWindowRect(hwnd, &wr);
    GetClientRect(hwnd, &cr);
    offset_width = offset_height = cfg.window_border;
    extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
    extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;
    }

    /*
     * Resize the window, now we know what size we _really_ want it
     * to be.
     */
    guess_width = extra_width + font_width * term->cols;
    guess_height = extra_height + font_height * term->rows;
    SetWindowPos(hwnd, NULL, 0, 0, guess_width, guess_height,
         SWP_NOMOVE | SWP_NOREDRAW | SWP_NOZORDER);

    /*
     * Set up a caret bitmap, with no content.
     */
    {
    char *bits;
    int size = (font_width + 15) / 16 * 2 * font_height;
    bits = snewn(size, char);
    memset(bits, 0, size);
    caretbm = CreateBitmap(font_width, font_height, 1, 1, bits);
    sfree(bits);
    }
    CreateCaret(hwnd, caretbm, font_width, font_height);

    /*
     * Initialise the scroll bar.
     */
    {
    SCROLLINFO si;

    si.cbSize = sizeof(si);
    si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
    si.nMin = 0;
    si.nMax = term->rows - 1;
    si.nPage = term->rows;
    si.nPos = 0;
    SetScrollInfo(hwnd, SB_VERT, &si, FALSE);
    }

    /*
     * Prepare the mouse handler.
     */
    lastact = MA_NOTHING;
    lastbtn = MBT_NOTHING;
    dbltime = GetDoubleClickTime();

    /*
     * Set up the session-control options on the system menu.
     */
    {
    HMENU m;
    int j;
    char *str;

    popup_menus[SYSMENU].menu = GetSystemMenu(hwnd, FALSE);
    popup_menus[CTXMENU].menu = CreatePopupMenu();
    AppendMenu(popup_menus[CTXMENU].menu, MF_ENABLED, IDM_PASTE, "&Paste");

    savedsess_menu = CreateMenu();
    get_sesslist(&sesslist, TRUE);
    update_savedsess_menu();

    for (j = 0; j < lenof(popup_menus); j++) {
        m = popup_menus[j].menu;

        AppendMenu(m, MF_SEPARATOR, 0, 0);
        AppendMenu(m, MF_ENABLED, IDM_SHOWLOG, "&Event Log");
        AppendMenu(m, MF_SEPARATOR, 0, 0);
        AppendMenu(m, MF_ENABLED, IDM_NEWSESS, "Ne&w Session...");
        AppendMenu(m, MF_ENABLED, IDM_DUPSESS, "&Duplicate Session");
        AppendMenu(m, MF_POPUP | MF_ENABLED, (UINT) savedsess_menu,
               "Sa&ved Sessions");
        AppendMenu(m, MF_ENABLED, IDM_RECONF, "Chan&ge Settings...");
        AppendMenu(m, MF_SEPARATOR, 0, 0);
        AppendMenu(m, MF_ENABLED, IDM_COPYALL, "C&opy All to Clipboard");
        AppendMenu(m, MF_ENABLED, IDM_CLRSB, "C&lear Scrollback");
        AppendMenu(m, MF_ENABLED, IDM_RESET, "Rese&t Terminal");
        AppendMenu(m, MF_SEPARATOR, 0, 0);
        AppendMenu(m, (cfg.resize_action == RESIZE_DISABLED) ?
               MF_GRAYED : MF_ENABLED, IDM_FULLSCREEN, "&Full Screen");
        AppendMenu(m, MF_SEPARATOR, 0, 0);
        if (has_help())
        AppendMenu(m, MF_ENABLED, IDM_HELP, "&Help");
        str = dupprintf("&About %s", appname);
        AppendMenu(m, MF_ENABLED, IDM_ABOUT, str);
        sfree(str);
    }
    }

    start_backend();

    /*
     * Set up the initial input locale.
     */
    set_input_locale(GetKeyboardLayout(0));

    /*
     * Finally show the window!
     */
    ShowWindow(hwnd, SW_HIDE);
    SetForegroundWindow(hwnd);

    /*
     * Set the palette up.
     */
    pal = NULL;
    logpal = NULL;
    init_palette();

    term_set_focus(term, GetForegroundWindow() == hwnd);
    UpdateWindow(hwnd);

    while (1) {
    HANDLE *handles;
    int nhandles, n;

    handles = handle_get_events(&nhandles);

    n = MsgWaitForMultipleObjects(nhandles, handles, FALSE, INFINITE,
                      QS_ALLINPUT);

    if ((unsigned)(n - WAIT_OBJECT_0) < (unsigned)nhandles) {
        handle_got_event(handles[n - WAIT_OBJECT_0]);
        sfree(handles);
        if (must_close_session)
        close_session();
    } else
        sfree(handles);

    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        if (msg.message == WM_QUIT)
        goto finished;           /* two-level break */

        if (!(IsWindow(logbox) && IsDialogMessage(logbox, &msg)))
        DispatchMessage(&msg);
        /* Send the paste buffer if there's anything to send */
        term_paste(term);
        /* If there's nothing new in the queue then we can do everything
         * we've delayed, reading the socket, writing, and repainting
         * the window.
         */
        if (must_close_session)
        close_session();

        goto finished;
    }

    /* The messages seem unreliable; especially if we're being tricky */
    term_set_focus(term, GetForegroundWindow() == hwnd);

    if (pending_netevent)
        enact_pending_netevent();

    net_pending_errors();
    }

    finished:
    cleanup_exit(0);           /* this doesn't return... */
    return 0;               /* ... but optimiser doesn't know */
}

/*
 * Clean up and exit.
 */
void cleanup_exit(int code)
{
    /*
     * Clean up.
     */
    deinit_fonts();
    sfree(logpal);
    if (pal)
    DeleteObject(pal);
    sk_cleanup();

    if (cfg.protocol == PROT_SSH) {
    random_save_seed();
#ifdef MSCRYPTOAPI
    crypto_wrapup();
#endif
    }
    shutdown_help();

    /* Clean up COM. */
    CoUninitialize();

    exit(code);
}

/*
 * Set up, or shut down, an AsyncSelect. Called from winnet.c.
 */
char *do_select(SOCKET skt, int startup)
{
    int msg, events;
    if (startup) {
    msg = WM_NETEVENT;
    events = (FD_CONNECT | FD_READ | FD_WRITE |
          FD_OOB | FD_CLOSE | FD_ACCEPT);
    } else {
    msg = events = 0;
    }
    if (!hwnd)
    return "do_select(): internal error (hwnd==NULL)";
    if (p_WSAAsyncSelect(skt, hwnd, msg, events) == SOCKET_ERROR) {
    switch (p_WSAGetLastError()) {
      case WSAENETDOWN:
        return "Network is down";
      default:
        return "WSAAsyncSelect(): unknown error";
    }
    }
    return NULL;
}

/*
 * Refresh the saved-session submenu from `sesslist'.
 */
static void update_savedsess_menu(void)
{
    int i;
    while (DeleteMenu(savedsess_menu, 0, MF_BYPOSITION)) ;
    /* skip sesslist.sessions[0] == Default Settings */
    for (i = 1;
     i < ((sesslist.nsessions <= MENU_SAVED_MAX+1) ? sesslist.nsessions
                               : MENU_SAVED_MAX+1);
     i++)
    AppendMenu(savedsess_menu, MF_ENABLED,
           IDM_SAVED_MIN + (i-1)*MENU_SAVED_STEP,
           sesslist.sessions[i]);
    if (sesslist.nsessions <= 1)
    AppendMenu(savedsess_menu, MF_GRAYED, IDM_SAVED_MIN, "(No sessions)");
}

/*
 * Update the Special Commands submenu.
 */
void update_specials_menu(void *frontend)
{
    HMENU new_menu;
    int i, j;

    if (back)
    specials = back->get_specials(backhandle);
    else
    specials = NULL;

    if (specials) {
    /* We can't use Windows to provide a stack for submenus, so
     * here's a lame "stack" that will do for now. */
    HMENU saved_menu = NULL;
    int nesting = 1;
    new_menu = CreatePopupMenu();
    for (i = 0; nesting > 0; i++) {
        assert(IDM_SPECIAL_MIN + 0x10 * i < IDM_SPECIAL_MAX);
        switch (specials[i].code) {
          case TS_SEP:
        AppendMenu(new_menu, MF_SEPARATOR, 0, 0);
        break;
          case TS_SUBMENU:
        assert(nesting < 2);
        nesting++;
        saved_menu = new_menu; /* XXX lame stacking */
        new_menu = CreatePopupMenu();
        AppendMenu(saved_menu, MF_POPUP | MF_ENABLED,
               (UINT) new_menu, specials[i].name);
        break;
          case TS_EXITMENU:
        nesting--;
        if (nesting) {
            new_menu = saved_menu; /* XXX lame stacking */
            saved_menu = NULL;
        }
        break;
          default:
        AppendMenu(new_menu, MF_ENABLED, IDM_SPECIAL_MIN + 0x10 * i,
               specials[i].name);
        break;
        }
    }
    /* Squirrel the highest special. */
    n_specials = i - 1;
    } else {
    new_menu = NULL;
    n_specials = 0;
    }

    for (j = 0; j < lenof(popup_menus); j++) {
    if (specials_menu) {
        /* XXX does this free up all submenus? */
        DeleteMenu(popup_menus[j].menu, (UINT)specials_menu, MF_BYCOMMAND);
        DeleteMenu(popup_menus[j].menu, IDM_SPECIALSEP, MF_BYCOMMAND);
    }
    if (new_menu) {
        InsertMenu(popup_menus[j].menu, IDM_SHOWLOG,
               MF_BYCOMMAND | MF_POPUP | MF_ENABLED,
               (UINT) new_menu, "S&pecial Command");
        InsertMenu(popup_menus[j].menu, IDM_SHOWLOG,
               MF_BYCOMMAND | MF_SEPARATOR, IDM_SPECIALSEP, 0);
    }
    }
    specials_menu = new_menu;
}

static void update_mouse_pointer(void)
{
    LPTSTR curstype;
    int force_visible = FALSE;
    static int forced_visible = FALSE;
    switch (busy_status) {
      case BUSY_NOT:
    if (send_raw_mouse)
        curstype = IDC_ARROW;
    else
        curstype = IDC_IBEAM;
    break;
      case BUSY_WAITING:
    curstype = IDC_APPSTARTING; /* this may be an abuse */
    force_visible = TRUE;
    break;
      case BUSY_CPU:
    curstype = IDC_WAIT;
    force_visible = TRUE;
    break;
      default:
    assert(0);
    }
    {
    HCURSOR cursor = LoadCursor(NULL, curstype);
    SetClassLongPtr(hwnd, GCLP_HCURSOR, (LONG_PTR)cursor);
    SetCursor(cursor); /* force redraw of cursor at current posn */
    }
    if (force_visible != forced_visible) {
    /* We want some cursor shapes to be visible always.
     * Along with show_mouseptr(), this manages the ShowCursor()
     * counter such that if we switch back to a non-force_visible
     * cursor, the previous visibility state is restored. */
    ShowCursor(force_visible);
    forced_visible = force_visible;
    }
}

void set_busy_status(void *frontend, int status)
{
    busy_status = status;
    update_mouse_pointer();
}

/*
 * set or clear the "raw mouse message" mode
 */
void set_raw_mouse_mode(void *frontend, int activate)
{
    activate = activate && !cfg.no_mouse_rep;
    send_raw_mouse = activate;
    update_mouse_pointer();
}

/*
 * Print a message box and close the connection.
 */
void connection_fatal(void *frontend, char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);

    if (cfg.close_on_exit == FORCE_ON)
    PostQuitMessage(1);
    else {
    must_close_session = TRUE;
    }
}

/*
 * Report an error at the command-line parsing stage.
 */
void cmdline_error(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Command Line Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    exit(1);
}

/*
 * Actually do the job requested by a WM_NETEVENT
 */
static void enact_pending_netevent(void)
{
    static int reentering = 0;
    extern int select_result(WPARAM, LPARAM);

    if (reentering)
    return;                   /* don't unpend the pending */

    pending_netevent = FALSE;

    reentering = 1;
    select_result(pend_netevent_wParam, pend_netevent_lParam);
    reentering = 0;
}

/*
 * Copy the colour palette from the configuration data into defpal.
 * This is non-trivial because the colour indices are different.
 */
static void cfgtopalette(void)
{
    int i;
    static const int ww[] = {
    256, 257, 258, 259, 260, 261,
    0, 8, 1, 9, 2, 10, 3, 11,
    4, 12, 5, 13, 6, 14, 7, 15
    };

    for (i = 0; i < 22; i++) {
    int w = ww[i];
    defpal[w].rgbtRed = cfg.colours[i][0];
    defpal[w].rgbtGreen = cfg.colours[i][1];
    defpal[w].rgbtBlue = cfg.colours[i][2];
    }
    for (i = 0; i < NEXTCOLOURS; i++) {
    if (i < 216) {
        int r = i / 36, g = (i / 6) % 6, b = i % 6;
        defpal[i+16].rgbtRed = r ? r * 40 + 55 : 0;
        defpal[i+16].rgbtGreen = g ? g * 40 + 55 : 0;
        defpal[i+16].rgbtBlue = b ? b * 40 + 55 : 0;
    } else {
        int shade = i - 216;
        shade = shade * 10 + 8;
        defpal[i+16].rgbtRed = defpal[i+16].rgbtGreen =
        defpal[i+16].rgbtBlue = shade;
    }
    }

    /* Override with system colours if appropriate */
    if (cfg.system_colour)
        systopalette();
}

/*
 * Override bit of defpal with colours from the system.
 * (NB that this takes a copy the system colours at the time this is called,
 * so subsequent colour scheme changes don't take effect. To fix that we'd
 * probably want to be using GetSysColorBrush() and the like.)
 */
static void systopalette(void)
{
    int i;
    static const struct { int nIndex; int norm; int bold; } or[] =
    {
    { COLOR_WINDOWTEXT,    256, 257 }, /* Default Foreground */
    { COLOR_WINDOW,        258, 259 }, /* Default Background */
    { COLOR_HIGHLIGHTTEXT,    260, 260 }, /* Cursor Text */
    { COLOR_HIGHLIGHT,    261, 261 }, /* Cursor Colour */
    };

    for (i = 0; i < (sizeof(or)/sizeof(or[0])); i++) {
    COLORREF colour = GetSysColor(or[i].nIndex);
    defpal[or[i].norm].rgbtRed =
       defpal[or[i].bold].rgbtRed = GetRValue(colour);
    defpal[or[i].norm].rgbtGreen =
       defpal[or[i].bold].rgbtGreen = GetGValue(colour);
    defpal[or[i].norm].rgbtBlue =
       defpal[or[i].bold].rgbtBlue = GetBValue(colour);
    }
}

/*
 * Set up the colour palette.
 */
static void init_palette(void)
{
    int i;
    HDC hdc = GetDC(hwnd);
    if (hdc) {
    if (cfg.try_palette && GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE) {
        /*
         * This is a genuine case where we must use smalloc
         * because the snew macros can't cope.
         */
        logpal = smalloc(sizeof(*logpal)
                 - sizeof(logpal->palPalEntry)
                 + NALLCOLOURS * sizeof(PALETTEENTRY));
        logpal->palVersion = 0x300;
        logpal->palNumEntries = NALLCOLOURS;
        for (i = 0; i < NALLCOLOURS; i++) {
        logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
        logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
        logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
        logpal->palPalEntry[i].peFlags = PC_NOCOLLAPSE;
        }
        pal = CreatePalette(logpal);
        if (pal) {
        SelectPalette(hdc, pal, FALSE);
        RealizePalette(hdc);
        SelectPalette(hdc, GetStockObject(DEFAULT_PALETTE), FALSE);
        }
    }
    ReleaseDC(hwnd, hdc);
    }
    if (pal)
    for (i = 0; i < NALLCOLOURS; i++)
        colours[i] = PALETTERGB(defpal[i].rgbtRed,
                    defpal[i].rgbtGreen,
                    defpal[i].rgbtBlue);
    else
    for (i = 0; i < NALLCOLOURS; i++)
        colours[i] = RGB(defpal[i].rgbtRed,
                 defpal[i].rgbtGreen, defpal[i].rgbtBlue);
}

/*
 * This is a wrapper to ExtTextOut() to force Windows to display
 * the precise glyphs we give it. Otherwise it would do its own
 * bidi and Arabic shaping, and we would end up uncertain which
 * characters it had put where.
 */
static void exact_textout(HDC hdc, int x, int y, CONST RECT *lprc,
              unsigned short *lpString, UINT cbCount,
              CONST INT *lpDx, int opaque)
{
#ifdef __LCC__
    /*
     * The LCC include files apparently don't supply the
     * GCP_RESULTSW type, but we can make do with GCP_RESULTS
     * proper: the differences aren't important to us (the only
     * variable-width string parameter is one we don't use anyway).
     */
    GCP_RESULTS gcpr;
#else
    GCP_RESULTSW gcpr;
#endif
    char *buffer = snewn(cbCount*2+2, char);
    char *classbuffer = snewn(cbCount, char);
    memset(&gcpr, 0, sizeof(gcpr));
    memset(buffer, 0, cbCount*2+2);
    memset(classbuffer, GCPCLASS_NEUTRAL, cbCount);

    gcpr.lStructSize = sizeof(gcpr);
    gcpr.lpGlyphs = (void *)buffer;
    gcpr.lpClass = (void *)classbuffer;
    gcpr.nGlyphs = cbCount;
    GetCharacterPlacementW(hdc, lpString, cbCount, 0, &gcpr,
               FLI_MASK | GCP_CLASSIN | GCP_DIACRITIC);

    ExtTextOut(hdc, x, y,
           ETO_GLYPH_INDEX | ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
           lprc, buffer, cbCount, lpDx);
}

/*
 * The exact_textout() wrapper, unfortunately, destroys the useful
 * Windows `font linking' behaviour: automatic handling of Unicode
 * code points not supported in this font by falling back to a font
 * which does contain them. Therefore, we adopt a multi-layered
 * approach: for any potentially-bidi text, we use exact_textout(),
 * and for everything else we use a simple ExtTextOut as we did
 * before exact_textout() was introduced.
 */
static void general_textout(HDC hdc, int x, int y, CONST RECT *lprc,
                unsigned short *lpString, UINT cbCount,
                CONST INT *lpDx, int opaque)
{
    int i, j, xp, xn;
    int bkmode = 0, got_bkmode = FALSE;

    xp = xn = x;

    for (i = 0; i < (int)cbCount ;) {
    int rtl = is_rtl(lpString[i]);

    xn += lpDx[i];

    for (j = i+1; j < (int)cbCount; j++) {
        if (rtl != is_rtl(lpString[j]))
        break;
        xn += lpDx[j];
    }

    /*
     * Now [i,j) indicates a maximal substring of lpString
     * which should be displayed using the same textout
     * function.
     */
    if (rtl) {
        exact_textout(hdc, xp, y, lprc, lpString+i, j-i,
                          font_varpitch ? NULL : lpDx+i, opaque);
    } else {
        ExtTextOutW(hdc, xp, y, ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
            lprc, lpString+i, j-i,
                        font_varpitch ? NULL : lpDx+i);
    }

    i = j;
    xp = xn;

        bkmode = GetBkMode(hdc);
        got_bkmode = TRUE;
        SetBkMode(hdc, TRANSPARENT);
        opaque = FALSE;
    }

    if (got_bkmode)
        SetBkMode(hdc, bkmode);
}

static int get_font_width(HDC hdc, const TEXTMETRIC *tm)
{
    int ret;
    /* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
    if (!(tm->tmPitchAndFamily & TMPF_FIXED_PITCH)) {
        ret = tm->tmAveCharWidth;
    } else {
#define FIRST '0'
#define LAST '9'
        ABCFLOAT widths[LAST-FIRST + 1];
        int j;

        font_varpitch = TRUE;
        font_dualwidth = TRUE;
        if (GetCharABCWidthsFloat(hdc, FIRST, LAST, widths)) {
            ret = 0;
            for (j = 0; j < lenof(widths); j++) {
                int width = (int)(0.5 + widths[j].abcfA +
                                  widths[j].abcfB + widths[j].abcfC);
                if (ret < width)
                    ret = width;
            }
        } else {
            ret = tm->tmMaxCharWidth;
        }
#undef FIRST
#undef LAST
    }
    return ret;
}

/*
 * Initialise all the fonts we will need initially. There may be as many as
 * three or as few as one.  The other (potentially) twenty-one fonts are done
 * if/when they are needed.
 *
 * We also:
 *
 * - check the font width and height, correcting our guesses if
 *   necessary.
 *
 * - verify that the bold font is the same width as the ordinary
 *   one, and engage shadow bolding if not.
 * 
 * - verify that the underlined font is the same width as the
 *   ordinary one (manual underlining by means of line drawing can
 *   be done in a pinch).
 */
static void init_fonts(int pick_width, int pick_height)
{
    TEXTMETRIC tm;
    CPINFO cpinfo;
    int fontsize[3];
    int i;
    HDC hdc;
    int fw_dontcare, fw_bold;

    for (i = 0; i < FONT_MAXNO; i++)
    fonts[i] = NULL;

    bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
    und_mode = UND_FONT;

    if (cfg.font.isbold) {
    fw_dontcare = FW_BOLD;
    fw_bold = FW_HEAVY;
    } else {
    fw_dontcare = FW_DONTCARE;
    fw_bold = FW_BOLD;
    }

    hdc = GetDC(hwnd);

    if (pick_height)
    font_height = pick_height;
    else {
    font_height = cfg.font.height;
    if (font_height > 0) {
        font_height =
        -MulDiv(font_height, GetDeviceCaps(hdc, LOGPIXELSY), 72);
    }
    }
    font_width = pick_width;

#define f(i,c,w,u) \
    fonts[i] = CreateFont (font_height, font_width, 0, 0, w, FALSE, u, FALSE, \
               c, OUT_DEFAULT_PRECIS, \
                   CLIP_DEFAULT_PRECIS, FONT_QUALITY(cfg.font_quality), \
               FIXED_PITCH | FF_DONTCARE, cfg.font.name)

    f(FONT_NORMAL, cfg.font.charset, fw_dontcare, FALSE);

    SelectObject(hdc, fonts[FONT_NORMAL]);
    GetTextMetrics(hdc, &tm);

    GetObject(fonts[FONT_NORMAL], sizeof(LOGFONT), &lfont);

    /* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
    if (!(tm.tmPitchAndFamily & TMPF_FIXED_PITCH)) {
        font_varpitch = FALSE;
        font_dualwidth = (tm.tmAveCharWidth != tm.tmMaxCharWidth);
    } else {
        font_varpitch = TRUE;
        font_dualwidth = TRUE;
    }
    if (pick_width == 0 || pick_height == 0) {
    font_height = tm.tmHeight;
        font_width = get_font_width(hdc, &tm);
    }

#ifdef RDB_DEBUG_PATCH
    debug(23, "Primary font H=%d, AW=%d, MW=%d",
        tm.tmHeight, tm.tmAveCharWidth, tm.tmMaxCharWidth);
#endif

    {
    CHARSETINFO info;
    DWORD cset = tm.tmCharSet;
    memset(&info, 0xFF, sizeof(info));

    /* !!! Yes the next line is right */
    if (cset == OEM_CHARSET)
        ucsdata.font_codepage = GetOEMCP();
    else
        if (TranslateCharsetInfo ((DWORD *) cset, &info, TCI_SRCCHARSET))
        ucsdata.font_codepage = info.ciACP;
    else
        ucsdata.font_codepage = -1;

    GetCPInfo(ucsdata.font_codepage, &cpinfo);
    ucsdata.dbcs_screenfont = (cpinfo.MaxCharSize > 1);
    }

    f(FONT_UNDERLINE, cfg.font.charset, fw_dontcare, TRUE);

    /*
     * Some fonts, e.g. 9-pt Courier, draw their underlines
     * outside their character cell. We successfully prevent
     * screen corruption by clipping the text output, but then
     * we lose the underline completely. Here we try to work
     * out whether this is such a font, and if it is, we set a
     * flag that causes underlines to be drawn by hand.
     *
     * Having tried other more sophisticated approaches (such
     * as examining the TEXTMETRIC structure or requesting the
     * height of a string), I think we'll do this the brute
     * force way: we create a small bitmap, draw an underlined
     * space on it, and test to see whether any pixels are
     * foreground-coloured. (Since we expect the underline to
     * go all the way across the character cell, we only search
     * down a single column of the bitmap, half way across.)
     */
    {
    HDC und_dc;
    HBITMAP und_bm, und_oldbm;
    int i, gotit;
    COLORREF c;

    und_dc = CreateCompatibleDC(hdc);
    und_bm = CreateCompatibleBitmap(hdc, font_width, font_height);
    und_oldbm = SelectObject(und_dc, und_bm);
    SelectObject(und_dc, fonts[FONT_UNDERLINE]);
    SetTextAlign(und_dc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
    SetTextColor(und_dc, RGB(255, 255, 255));
    SetBkColor(und_dc, RGB(0, 0, 0));
    SetBkMode(und_dc, OPAQUE);
    ExtTextOut(und_dc, 0, 0, ETO_OPAQUE, NULL, " ", 1, NULL);
    gotit = FALSE;
    for (i = 0; i < font_height; i++) {
        c = GetPixel(und_dc, font_width / 2, i);
        if (c != RGB(0, 0, 0))
        gotit = TRUE;
    }
    SelectObject(und_dc, und_oldbm);
    DeleteObject(und_bm);
    DeleteDC(und_dc);
    if (!gotit) {
        und_mode = UND_LINE;
        DeleteObject(fonts[FONT_UNDERLINE]);
        fonts[FONT_UNDERLINE] = 0;
    }
    }

    if (bold_mode == BOLD_FONT) {
    f(FONT_BOLD, cfg.font.charset, fw_bold, FALSE);
    }
#undef f

    descent = tm.tmAscent + 1;
    if (descent >= font_height)
    descent = font_height - 1;

    for (i = 0; i < 3; i++) {
    if (fonts[i]) {
        if (SelectObject(hdc, fonts[i]) && GetTextMetrics(hdc, &tm))
        fontsize[i] = get_font_width(hdc, &tm) + 256 * tm.tmHeight;
        else
        fontsize[i] = -i;
    } else
        fontsize[i] = -i;
    }

    ReleaseDC(hwnd, hdc);

    if (fontsize[FONT_UNDERLINE] != fontsize[FONT_NORMAL]) {
    und_mode = UND_LINE;
    DeleteObject(fonts[FONT_UNDERLINE]);
    fonts[FONT_UNDERLINE] = 0;
    }

    if (bold_mode == BOLD_FONT &&
    fontsize[FONT_BOLD] != fontsize[FONT_NORMAL]) {
    bold_mode = BOLD_SHADOW;
    DeleteObject(fonts[FONT_BOLD]);
    fonts[FONT_BOLD] = 0;
    }
    fontflag[0] = fontflag[1] = fontflag[2] = 1;

    init_ucs(&cfg, &ucsdata);
}

static void another_font(int fontno)
{
    int basefont;
    int fw_dontcare, fw_bold;
    int c, u, w, x;
    char *s;

    if (fontno < 0 || fontno >= FONT_MAXNO || fontflag[fontno])
    return;

    basefont = (fontno & ~(FONT_BOLDUND));
    if (basefont != fontno && !fontflag[basefont])
    another_font(basefont);

    if (cfg.font.isbold) {
    fw_dontcare = FW_BOLD;
    fw_bold = FW_HEAVY;
    } else {
    fw_dontcare = FW_DONTCARE;
    fw_bold = FW_BOLD;
    }

    c = cfg.font.charset;
    w = fw_dontcare;
    u = FALSE;
    s = cfg.font.name;
    x = font_width;

    if (fontno & FONT_WIDE)
    x *= 2;
    if (fontno & FONT_NARROW)
    x = (x+1)/2;
    if (fontno & FONT_OEM)
    c = OEM_CHARSET;
    if (fontno & FONT_BOLD)
    w = fw_bold;
    if (fontno & FONT_UNDERLINE)
    u = TRUE;

    fonts[fontno] =
    CreateFont(font_height * (1 + !!(fontno & FONT_HIGH)), x, 0, 0, w,
           FALSE, u, FALSE, c, OUT_DEFAULT_PRECIS,
           CLIP_DEFAULT_PRECIS, FONT_QUALITY(cfg.font_quality),
           DEFAULT_PITCH | FF_DONTCARE, s);

    fontflag[fontno] = 1;
}

static void deinit_fonts(void)
{
    int i;
    for (i = 0; i < FONT_MAXNO; i++) {
    if (fonts[i])
        DeleteObject(fonts[i]);
    fonts[i] = 0;
    fontflag[i] = 0;
    }
}

void request_resize(void *frontend, int w, int h)
{
    int width, height;

    /* If the window is maximized supress resizing attempts */
    if (IsZoomed(hwnd)) {
    if (cfg.resize_action == RESIZE_TERM)
        return;
    }

    if (cfg.resize_action == RESIZE_DISABLED) return;
    if (h == term->rows && w == term->cols) return;

    /* Sanity checks ... */
    {
    static int first_time = 1;
    static RECT ss;

    switch (first_time) {
      case 1:
        /* Get the size of the screen */
        if (get_fullscreen_rect(&ss))
        /* first_time = 0 */ ;
        else {
        first_time = 2;
        break;
        }
      case 0:
        /* Make sure the values are sane */
        width = (ss.right - ss.left - extra_width) / 4;
        height = (ss.bottom - ss.top - extra_height) / 6;

        if (w > width || h > height)
        return;
        if (w < 15)
        w = 15;
        if (h < 1)
        h = 1;
    }
    }

    term_size(term, h, w, cfg.savelines);

    if (cfg.resize_action != RESIZE_FONT && !IsZoomed(hwnd)) {
    width = extra_width + font_width * w;
    height = extra_height + font_height * h;

    SetWindowPos(hwnd, NULL, 0, 0, width, height,
        SWP_NOACTIVATE | SWP_NOCOPYBITS |
        SWP_NOMOVE | SWP_NOZORDER);
    } else
    reset_window(0);

    InvalidateRect(hwnd, NULL, TRUE);
}

static void reset_window(int reinit) {
    /*
     * This function decides how to resize or redraw when the 
     * user changes something. 
     *
     * This function doesn't like to change the terminal size but if the
     * font size is locked that may be it's only soluion.
     */
    int win_width, win_height;
    RECT cr, wr;

#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window()"));
#endif

    /* Current window sizes ... */
    GetWindowRect(hwnd, &wr);
    GetClientRect(hwnd, &cr);

    win_width  = cr.right - cr.left;
    win_height = cr.bottom - cr.top;

    if (cfg.resize_action == RESIZE_DISABLED) reinit = 2;

    /* Are we being forced to reload the fonts ? */
    if (reinit>1) {
#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window() -- Forced deinit"));
#endif
    deinit_fonts();
    init_fonts(0,0);
    }

    /* Oh, looks like we're minimised */
    if (win_width == 0 || win_height == 0)
    return;

    /* Is the window out of position ? */
    if ( !reinit && 
        (offset_width != (win_width-font_width*term->cols)/2 ||
         offset_height != (win_height-font_height*term->rows)/2) ){
    offset_width = (win_width-font_width*term->cols)/2;
    offset_height = (win_height-font_height*term->rows)/2;
    InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window() -> Reposition terminal"));
#endif
    }

    if (IsZoomed(hwnd)) {
    /* We're fullscreen, this means we must not change the size of
     * the window so it's the font size or the terminal itself.
     */

    extra_width = wr.right - wr.left - cr.right + cr.left;
    extra_height = wr.bottom - wr.top - cr.bottom + cr.top;

    if (cfg.resize_action != RESIZE_TERM) {
        if (  font_width != win_width/term->cols || 
          font_height != win_height/term->rows) {
        deinit_fonts();
        init_fonts(win_width/term->cols, win_height/term->rows);
        offset_width = (win_width-font_width*term->cols)/2;
        offset_height = (win_height-font_height*term->rows)/2;
        InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
        debug((25, "reset_window() -> Z font resize to (%d, %d)",
            font_width, font_height));
#endif
        }
    } else {
        if (  font_width * term->cols != win_width || 
          font_height * term->rows != win_height) {
        /* Our only choice at this point is to change the 
         * size of the terminal; Oh well.
         */
        term_size(term, win_height/font_height, win_width/font_width,
              cfg.savelines);
        offset_width = (win_width-font_width*term->cols)/2;
        offset_height = (win_height-font_height*term->rows)/2;
        InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
        debug((27, "reset_window() -> Zoomed term_size"));
#endif
        }
    }
    return;
    }

    /* Hmm, a force re-init means we should ignore the current window
     * so we resize to the default font size.
     */
    if (reinit>0) {
#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window() -> Forced re-init"));
#endif

    offset_width = offset_height = cfg.window_border;
    extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
    extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;

    if (win_width != font_width*term->cols + offset_width*2 ||
        win_height != font_height*term->rows + offset_height*2) {

        /* If this is too large windows will resize it to the maximum
         * allowed window size, we will then be back in here and resize
         * the font or terminal to fit.
         */
        SetWindowPos(hwnd, NULL, 0, 0, 
                 font_width*term->cols + extra_width, 
             font_height*term->rows + extra_height,
             SWP_NOMOVE | SWP_NOZORDER);
    }

    InvalidateRect(hwnd, NULL, TRUE);
    return;
    }

    /* Okay the user doesn't want us to change the font so we try the 
     * window. But that may be too big for the screen which forces us
     * to change the terminal.
     */
    if ((cfg.resize_action == RESIZE_TERM && reinit<=0) ||
        (cfg.resize_action == RESIZE_EITHER && reinit<0) ||
        reinit>0) {
    offset_width = offset_height = cfg.window_border;
    extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
    extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;

    if (win_width != font_width*term->cols + offset_width*2 ||
        win_height != font_height*term->rows + offset_height*2) {

        static RECT ss;
        int width, height;
        
        get_fullscreen_rect(&ss);

        width = (ss.right - ss.left - extra_width) / font_width;
        height = (ss.bottom - ss.top - extra_height) / font_height;

        /* Grrr too big */
        if ( term->rows > height || term->cols > width ) {
        if (cfg.resize_action == RESIZE_EITHER) {
            /* Make the font the biggest we can */
            if (term->cols > width)
            font_width = (ss.right - ss.left - extra_width)
                / term->cols;
            if (term->rows > height)
            font_height = (ss.bottom - ss.top - extra_height)
                / term->rows;

            deinit_fonts();
            init_fonts(font_width, font_height);

            width = (ss.right - ss.left - extra_width) / font_width;
            height = (ss.bottom - ss.top - extra_height) / font_height;
        } else {
            if ( height > term->rows ) height = term->rows;
            if ( width > term->cols )  width = term->cols;
            term_size(term, height, width, cfg.savelines);
#ifdef RDB_DEBUG_PATCH
            debug((27, "reset_window() -> term resize to (%d,%d)",
                   height, width));
#endif
        }
        }
        
        SetWindowPos(hwnd, NULL, 0, 0, 
                 font_width*term->cols + extra_width, 
             font_height*term->rows + extra_height,
             SWP_NOMOVE | SWP_NOZORDER);

        InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
        debug((27, "reset_window() -> window resize to (%d,%d)",
            font_width*term->cols + extra_width,
            font_height*term->rows + extra_height));
#endif
    }
    return;
    }

    /* We're allowed to or must change the font but do we want to ?  */

    if (font_width != (win_width-cfg.window_border*2)/term->cols || 
    font_height != (win_height-cfg.window_border*2)/term->rows) {

    deinit_fonts();
    init_fonts((win_width-cfg.window_border*2)/term->cols, 
           (win_height-cfg.window_border*2)/term->rows);
    offset_width = (win_width-font_width*term->cols)/2;
    offset_height = (win_height-font_height*term->rows)/2;

    extra_width = wr.right - wr.left - cr.right + cr.left +offset_width*2;
    extra_height = wr.bottom - wr.top - cr.bottom + cr.top+offset_height*2;

    InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
    debug((25, "reset_window() -> font resize to (%d,%d)", 
           font_width, font_height));
#endif
    }
}

static void set_input_locale(HKL kl)
{
    char lbuf[20];

    GetLocaleInfo(LOWORD(kl), LOCALE_IDEFAULTANSICODEPAGE,
          lbuf, sizeof(lbuf));

    kbd_codepage = atoi(lbuf);
}

static void click(Mouse_Button b, int x, int y, int shift, int ctrl, int alt)
{
    int thistime = GetMessageTime();

    if (send_raw_mouse && !(cfg.mouse_override && shift)) {
    lastbtn = MBT_NOTHING;
    term_mouse(term, b, translate_button(b), MA_CLICK,
           x, y, shift, ctrl, alt);
    return;
    }

    if (lastbtn == b && thistime - lasttime < dbltime) {
    lastact = (lastact == MA_CLICK ? MA_2CLK :
           lastact == MA_2CLK ? MA_3CLK :
           lastact == MA_3CLK ? MA_CLICK : MA_NOTHING);
    } else {
    lastbtn = b;
    lastact = MA_CLICK;
    }
    if (lastact != MA_NOTHING)
    term_mouse(term, b, translate_button(b), lastact,
           x, y, shift, ctrl, alt);
    lasttime = thistime;
}

/*
 * Translate a raw mouse button designation (LEFT, MIDDLE, RIGHT)
 * into a cooked one (SELECT, EXTEND, PASTE).
 */
static Mouse_Button translate_button(Mouse_Button button)
{
    if (button == MBT_LEFT)
    return MBT_SELECT;
    if (button == MBT_MIDDLE)
    return cfg.mouse_is_xterm == 1 ? MBT_PASTE : MBT_EXTEND;
    if (button == MBT_RIGHT)
    return cfg.mouse_is_xterm == 1 ? MBT_EXTEND : MBT_PASTE;
    return 0;                   /* shouldn't happen */
}

static void show_mouseptr(int show)
{
    /* NB that the counter in ShowCursor() is also frobbed by
     * update_mouse_pointer() */
    static int cursor_visible = 1;
    if (!cfg.hide_mouseptr)           /* override if this feature disabled */
    show = 1;
    if (cursor_visible && !show)
    ShowCursor(FALSE);
    else if (!cursor_visible && show)
    ShowCursor(TRUE);
    cursor_visible = show;
}

static int is_alt_pressed(void)
{
    BYTE keystate[256];
    int r = GetKeyboardState(keystate);
    if (!r)
    return FALSE;
    if (keystate[VK_MENU] & 0x80)
    return TRUE;
    if (keystate[VK_RMENU] & 0x80)
    return TRUE;
    return FALSE;
}

static int resizing;

void notify_remote_exit(void *fe)
{
    int exitcode;

    if (!session_closed &&
        (exitcode = back->exitcode(backhandle)) >= 0) {
    /* Abnormal exits will already have set session_closed and taken
     * appropriate action. */
    if (cfg.close_on_exit == FORCE_ON ||
        (cfg.close_on_exit == AUTO && exitcode != INT_MAX)) {
        PostQuitMessage(0);
    } else {
        must_close_session = TRUE;
        session_closed = TRUE;
        /* exitcode == INT_MAX indicates that the connection was closed
         * by a fatal error, so an error box will be coming our way and
         * we should not generate this informational one. */
        if (exitcode != INT_MAX)
        MessageBox(hwnd, "Connection closed by remote host",
               appname, MB_OK | MB_ICONINFORMATION);
    }
    }
}

void timer_change_notify(long next)
{
    long ticks = next - GETTICKCOUNT();
    if (ticks <= 0) ticks = 1;           /* just in case */
    KillTimer(hwnd, TIMING_TIMER_ID);
    SetTimer(hwnd, TIMING_TIMER_ID, ticks, NULL);
    timing_next_time = next;
}

static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
                WPARAM wParam, LPARAM lParam)
{
#if 0
    HDC hdc;
    static int ignore_clip = FALSE;
    static int need_backend_resize = FALSE;
    static int fullscr_on_max = FALSE;
    static int processed_resize = FALSE;
    static UINT last_mousemove = 0;

    switch (message) {
      case WM_TIMER:
    if ((UINT_PTR)wParam == TIMING_TIMER_ID) {
        long next;

        KillTimer(hwnd, TIMING_TIMER_ID);
        if (run_timers(timing_next_time, &next)) {
        timer_change_notify(next);
        } else {
        }
    }
    return 0;
      case WM_CREATE:
    break;
      case WM_CLOSE:
    {
        char *str;
        show_mouseptr(1);
        str = dupprintf("%s Exit Confirmation", appname);
        if (!cfg.warn_on_close || session_closed ||
        MessageBox(hwnd,
               "Are you sure you want to close this session?",
               str, MB_ICONWARNING | MB_OKCANCEL | MB_DEFBUTTON1)
        == IDOK)
        DestroyWindow(hwnd);
        sfree(str);
    }
    return 0;
      case WM_DESTROY:
    show_mouseptr(1);
    PostQuitMessage(0);
    return 0;
      case WM_INITMENUPOPUP:
    if ((HMENU)wParam == savedsess_menu) {
        /* About to pop up Saved Sessions sub-menu.
         * Refresh the session list. */
        get_sesslist(&sesslist, FALSE); /* free */
        get_sesslist(&sesslist, TRUE);
        update_savedsess_menu();
        return 0;
    }
    break;
      case WM_COMMAND:
      case WM_SYSCOMMAND:
    switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
      case IDM_SHOWLOG:
        showeventlog(hwnd);
        break;
      case IDM_NEWSESS:
      case IDM_DUPSESS:
      case IDM_SAVEDSESS:
        {
        char b[2048];
        char c[30], *cl;
        int freecl = FALSE;
        BOOL inherit_handles;
        STARTUPINFO si;
        PROCESS_INFORMATION pi;
        HANDLE filemap = NULL;

        if (wParam == IDM_DUPSESS) {
            /*
             * Allocate a file-mapping memory chunk for the
             * config structure.
             */
            SECURITY_ATTRIBUTES sa;
            Config *p;

            sa.nLength = sizeof(sa);
            sa.lpSecurityDescriptor = NULL;
            sa.bInheritHandle = TRUE;
            filemap = CreateFileMapping(INVALID_HANDLE_VALUE,
                        &sa,
                        PAGE_READWRITE,
                        0, sizeof(Config), NULL);
            if (filemap && filemap != INVALID_HANDLE_VALUE) {
            p = (Config *) MapViewOfFile(filemap,
                             FILE_MAP_WRITE,
                             0, 0, sizeof(Config));
            if (p) {
                *p = cfg;  /* structure copy */
                UnmapViewOfFile(p);
            }
            }
            inherit_handles = TRUE;
            sprintf(c, "putty &%p", filemap);
            cl = c;
        } else if (wParam == IDM_SAVEDSESS) {
            unsigned int sessno = ((lParam - IDM_SAVED_MIN)
                       / MENU_SAVED_STEP) + 1;
            if (sessno < (unsigned)sesslist.nsessions) {
            char *session = sesslist.sessions[sessno];
            cl = dupprintf("putty @%s", session);
            inherit_handles = FALSE;
            freecl = TRUE;
            } else
            break;
        } else /* IDM_NEWSESS */ {
            cl = NULL;
            inherit_handles = FALSE;
        }

        GetModuleFileName(NULL, b, sizeof(b) - 1);
        si.cb = sizeof(si);
        si.lpReserved = NULL;
        si.lpDesktop = NULL;
        si.lpTitle = NULL;
        si.dwFlags = 0;
        si.cbReserved2 = 0;
        si.lpReserved2 = NULL;
        CreateProcess(b, cl, NULL, NULL, inherit_handles,
                  NORMAL_PRIORITY_CLASS, NULL, NULL, &si, &pi);

        if (filemap)
            CloseHandle(filemap);
        if (freecl)
            sfree(cl);
        }
        break;
      case IDM_RESTART:
        if (!back) {
        logevent(NULL, "----- Session restarted -----");
        term_pwron(term, FALSE);
        start_backend();
        }

        break;
      case IDM_RECONF:
        {
        Config prev_cfg;
        int init_lvl = 1;
        int reconfig_result;

        if (reconfiguring)
            break;
        else
            reconfiguring = TRUE;

        GetWindowText(hwnd, cfg.wintitle, sizeof(cfg.wintitle));
        prev_cfg = cfg;

        reconfig_result =
            do_reconfig(hwnd, back ? back->cfg_info(backhandle) : 0);
        reconfiguring = FALSE;
        if (!reconfig_result)
            break;

        {
            /* Disable full-screen if resizing forbidden */
            int i;
            for (i = 0; i < lenof(popup_menus); i++)
            EnableMenuItem(popup_menus[i].menu, IDM_FULLSCREEN,
                       MF_BYCOMMAND | 
                       (cfg.resize_action == RESIZE_DISABLED)
                       ? MF_GRAYED : MF_ENABLED);
            /* Gracefully unzoom if necessary */
            if (IsZoomed(hwnd) &&
            (cfg.resize_action == RESIZE_DISABLED)) {
            ShowWindow(hwnd, SW_RESTORE);
            }
        }

        /* Pass new config data to the logging module */
        log_reconfig(logctx, &cfg);

        sfree(logpal);
        /*
         * Flush the line discipline's edit buffer in the
         * case where local editing has just been disabled.
         */
        if (ldisc)
            ldisc_send(ldisc, NULL, 0, 0);
        if (pal)
            DeleteObject(pal);
        logpal = NULL;
        pal = NULL;
        cfgtopalette();
        init_palette();

        /* Pass new config data to the terminal */
        term_reconfig(term, &cfg);

        /* Pass new config data to the back end */
        if (back)
            back->reconfig(backhandle, &cfg);

        /* Screen size changed ? */
        if (cfg.height != prev_cfg.height ||
            cfg.width != prev_cfg.width ||
            cfg.savelines != prev_cfg.savelines ||
            cfg.resize_action == RESIZE_FONT ||
            (cfg.resize_action == RESIZE_EITHER && IsZoomed(hwnd)) ||
            cfg.resize_action == RESIZE_DISABLED)
            term_size(term, cfg.height, cfg.width, cfg.savelines);

        /* Enable or disable the scroll bar, etc */
        {
            LONG nflg, flag = GetWindowLongPtr(hwnd, GWL_STYLE);
            LONG nexflag, exflag =
            GetWindowLongPtr(hwnd, GWL_EXSTYLE);

            nexflag = exflag;
            if (cfg.alwaysontop != prev_cfg.alwaysontop) {
            if (cfg.alwaysontop) {
                nexflag |= WS_EX_TOPMOST;
                SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
                     SWP_NOMOVE | SWP_NOSIZE);
            } else {
                nexflag &= ~(WS_EX_TOPMOST);
                SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
                     SWP_NOMOVE | SWP_NOSIZE);
            }
            }
            if (cfg.sunken_edge)
            nexflag |= WS_EX_CLIENTEDGE;
            else
            nexflag &= ~(WS_EX_CLIENTEDGE);

            nflg = flag;
            if (is_full_screen() ?
            cfg.scrollbar_in_fullscreen : cfg.scrollbar)
            nflg |= WS_VSCROLL;
            else
            nflg &= ~WS_VSCROLL;

            if (cfg.resize_action == RESIZE_DISABLED ||
                        is_full_screen())
            nflg &= ~WS_THICKFRAME;
            else
            nflg |= WS_THICKFRAME;

            if (cfg.resize_action == RESIZE_DISABLED)
            nflg &= ~WS_MAXIMIZEBOX;
            else
            nflg |= WS_MAXIMIZEBOX;

            if (nflg != flag || nexflag != exflag) {
            if (nflg != flag)
                SetWindowLongPtr(hwnd, GWL_STYLE, nflg);
            if (nexflag != exflag)
                SetWindowLongPtr(hwnd, GWL_EXSTYLE, nexflag);

            SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
                     SWP_NOACTIVATE | SWP_NOCOPYBITS |
                     SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
                     SWP_FRAMECHANGED);

            init_lvl = 2;
            }
        }

        /* Oops */
        if (cfg.resize_action == RESIZE_DISABLED && IsZoomed(hwnd)) {
            force_normal(hwnd);
            init_lvl = 2;
        }

        set_title(NULL, cfg.wintitle);
        if (IsIconic(hwnd)) {
            SetWindowText(hwnd,
                  cfg.win_name_always ? window_name :
                  icon_name);
        }

        if (strcmp(cfg.font.name, prev_cfg.font.name) != 0 ||
            strcmp(cfg.line_codepage, prev_cfg.line_codepage) != 0 ||
            cfg.font.isbold != prev_cfg.font.isbold ||
            cfg.font.height != prev_cfg.font.height ||
            cfg.font.charset != prev_cfg.font.charset ||
            cfg.font_quality != prev_cfg.font_quality ||
            cfg.vtmode != prev_cfg.vtmode ||
            cfg.bold_colour != prev_cfg.bold_colour ||
            cfg.resize_action == RESIZE_DISABLED ||
            cfg.resize_action == RESIZE_EITHER ||
            (cfg.resize_action != prev_cfg.resize_action))
            init_lvl = 2;

        InvalidateRect(hwnd, NULL, TRUE);
        reset_window(init_lvl);
        net_pending_errors();
        }
        break;
      case IDM_COPYALL:
        term_copyall(term);
        break;
      case IDM_PASTE:
        request_paste(NULL);
        break;
      case IDM_CLRSB:
        term_clrsb(term);
        break;
      case IDM_RESET:
        term_pwron(term, TRUE);
        if (ldisc)
        ldisc_send(ldisc, NULL, 0, 0);
        break;
      case IDM_ABOUT:
        showabout(hwnd);
        break;
      case IDM_HELP:
        launch_help(hwnd, NULL);
        break;
      case SC_MOUSEMENU:
        /*
         * We get this if the System menu has been activated
         * using the mouse.
         */
        show_mouseptr(1);
        break;
          case SC_KEYMENU:
        /*
         * We get this if the System menu has been activated
         * using the keyboard. This might happen from within
         * TranslateKey, in which case it really wants to be
         * followed by a `space' character to actually _bring
         * the menu up_ rather than just sitting there in
         * `ready to appear' state.
         */
        show_mouseptr(1);           /* make sure pointer is visible */
        if( lParam == 0 )
        PostMessage(hwnd, WM_CHAR, ' ', 0);
        break;
      case IDM_FULLSCREEN:
        flip_full_screen();
        break;
      default:
        if (wParam >= IDM_SAVED_MIN && wParam < IDM_SAVED_MAX) {
        SendMessage(hwnd, WM_SYSCOMMAND, IDM_SAVEDSESS, wParam);
        }
        if (wParam >= IDM_SPECIAL_MIN && wParam <= IDM_SPECIAL_MAX) {
        int i = (wParam - IDM_SPECIAL_MIN) / 0x10;
        /*
         * Ensure we haven't been sent a bogus SYSCOMMAND
         * which would cause us to reference invalid memory
         * and crash. Perhaps I'm just too paranoid here.
         */
        if (i >= n_specials)
            break;
        if (back)
            back->special(backhandle, specials[i].code);
        net_pending_errors();
        }
    }
    break;

#define X_POS(l) ((int)(short)LOWORD(l))
#define Y_POS(l) ((int)(short)HIWORD(l))

#define TO_CHR_X(x) ((((x)<0 ? (x)-font_width+1 : (x))-offset_width) / font_width)
#define TO_CHR_Y(y) ((((y)<0 ? (y)-font_height+1: (y))-offset_height) / font_height)
      case WM_LBUTTONDOWN:
      case WM_MBUTTONDOWN:
      case WM_RBUTTONDOWN:
      case WM_LBUTTONUP:
      case WM_MBUTTONUP:
      case WM_RBUTTONUP:
    if (message == WM_RBUTTONDOWN &&
        ((wParam & MK_CONTROL) || (cfg.mouse_is_xterm == 2))) {
        POINT cursorpos;

        show_mouseptr(1);           /* make sure pointer is visible */
        GetCursorPos(&cursorpos);
        TrackPopupMenu(popup_menus[CTXMENU].menu,
               TPM_LEFTALIGN | TPM_TOPALIGN | TPM_RIGHTBUTTON,
               cursorpos.x, cursorpos.y,
               0, hwnd, NULL);
        break;
    }
    {
        int button, press;

        switch (message) {
          case WM_LBUTTONDOWN:
        button = MBT_LEFT;
        wParam |= MK_LBUTTON;
        press = 1;
        break;
          case WM_MBUTTONDOWN:
        button = MBT_MIDDLE;
        wParam |= MK_MBUTTON;
        press = 1;
        break;
          case WM_RBUTTONDOWN:
        button = MBT_RIGHT;
        wParam |= MK_RBUTTON;
        press = 1;
        break;
          case WM_LBUTTONUP:
        button = MBT_LEFT;
        wParam &= ~MK_LBUTTON;
        press = 0;
        break;
          case WM_MBUTTONUP:
        button = MBT_MIDDLE;
        wParam &= ~MK_MBUTTON;
        press = 0;
        break;
          case WM_RBUTTONUP:
        button = MBT_RIGHT;
        wParam &= ~MK_RBUTTON;
        press = 0;
        break;
          default:
        button = press = 0;    /* shouldn't happen */
        }
        show_mouseptr(1);
        /*
         * Special case: in full-screen mode, if the left
         * button is clicked in the very top left corner of the
         * window, we put up the System menu instead of doing
         * selection.
         */
        {
        char mouse_on_hotspot = 0;
        POINT pt;

        GetCursorPos(&pt);
#ifndef NO_MULTIMON
        {
            HMONITOR mon;
            MONITORINFO mi;

            mon = MonitorFromPoint(pt, MONITOR_DEFAULTTONULL);

            if (mon != NULL) {
            mi.cbSize = sizeof(MONITORINFO);
            GetMonitorInfo(mon, &mi);

            if (mi.rcMonitor.left == pt.x &&
                mi.rcMonitor.top == pt.y) {
                mouse_on_hotspot = 1;
            }
            }
        }
#else
        if (pt.x == 0 && pt.y == 0) {
            mouse_on_hotspot = 1;
        }
#endif
        if (is_full_screen() && press &&
            button == MBT_LEFT && mouse_on_hotspot) {
            SendMessage(hwnd, WM_SYSCOMMAND, SC_MOUSEMENU,
                MAKELPARAM(pt.x, pt.y));
            return 0;
        }
        }

        if (press) {
        click(button,
              TO_CHR_X(X_POS(lParam)), TO_CHR_Y(Y_POS(lParam)),
              wParam & MK_SHIFT, wParam & MK_CONTROL,
              is_alt_pressed());
        SetCapture(hwnd);
        } else {
        term_mouse(term, button, translate_button(button), MA_RELEASE,
               TO_CHR_X(X_POS(lParam)),
               TO_CHR_Y(Y_POS(lParam)), wParam & MK_SHIFT,
               wParam & MK_CONTROL, is_alt_pressed());
        if (!(wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)))
            ReleaseCapture();
        }
    }
    return 0;
      case WM_MOUSEMOVE:
    {
        /*
         * Windows seems to like to occasionally send MOUSEMOVE
         * events even if the mouse hasn't moved. Don't unhide
         * the mouse pointer in this case.
         */
        static WPARAM wp = 0;
        static LPARAM lp = 0;
        if (wParam != wp || lParam != lp ||
        last_mousemove != WM_MOUSEMOVE) {
        show_mouseptr(1);
        wp = wParam; lp = lParam;
        last_mousemove = WM_MOUSEMOVE;
        }
    }
    /*
     * Add the mouse position and message time to the random
     * number noise.
     */
    noise_ultralight(lParam);

    if (wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON) &&
        GetCapture() == hwnd) {
        Mouse_Button b;
        if (wParam & MK_LBUTTON)
        b = MBT_LEFT;
        else if (wParam & MK_MBUTTON)
        b = MBT_MIDDLE;
        else
        b = MBT_RIGHT;
        term_mouse(term, b, translate_button(b), MA_DRAG,
               TO_CHR_X(X_POS(lParam)),
               TO_CHR_Y(Y_POS(lParam)), wParam & MK_SHIFT,
               wParam & MK_CONTROL, is_alt_pressed());
    }
    return 0;
      case WM_NCMOUSEMOVE:
    {
        static WPARAM wp = 0;
        static LPARAM lp = 0;
        if (wParam != wp || lParam != lp ||
        last_mousemove != WM_NCMOUSEMOVE) {
        show_mouseptr(1);
        wp = wParam; lp = lParam;
        last_mousemove = WM_NCMOUSEMOVE;
        }
    }
    noise_ultralight(lParam);
    break;
      case WM_IGNORE_CLIP:
    ignore_clip = wParam;           /* don't panic on DESTROYCLIPBOARD */
    break;
      case WM_DESTROYCLIPBOARD:
    if (!ignore_clip)
        term_deselect(term);
    ignore_clip = FALSE;
    return 0;
      case WM_PAINT:
    {
        PAINTSTRUCT p;

        HideCaret(hwnd);
        hdc = BeginPaint(hwnd, &p);
        if (pal) {
        SelectPalette(hdc, pal, TRUE);
        RealizePalette(hdc);
        }

        /*
         * We have to be careful about term_paint(). It will
         * set a bunch of character cells to INVALID and then
         * call do_paint(), which will redraw those cells and
         * _then mark them as done_. This may not be accurate:
         * when painting in WM_PAINT context we are restricted
         * to the rectangle which has just been exposed - so if
         * that only covers _part_ of a character cell and the
         * rest of it was already visible, that remainder will
         * not be redrawn at all. Accordingly, we must not
         * paint any character cell in a WM_PAINT context which
         * already has a pending update due to terminal output.
         * The simplest solution to this - and many, many
         * thanks to Hung-Te Lin for working all this out - is
         * not to do any actual painting at _all_ if there's a
         * pending terminal update: just mark the relevant
         * character cells as INVALID and wait for the
         * scheduled full update to sort it out.
         * 
         * I have a suspicion this isn't the _right_ solution.
         * An alternative approach would be to have terminal.c
         * separately track what _should_ be on the terminal
         * screen and what _is_ on the terminal screen, and
         * have two completely different types of redraw (one
         * for full updates, which syncs the former with the
         * terminal itself, and one for WM_PAINT which syncs
         * the latter with the former); yet another possibility
         * would be to have the Windows front end do what the
         * GTK one already does, and maintain a bitmap of the
         * current terminal appearance so that WM_PAINT becomes
         * completely trivial. However, this should do for now.
         */
        term_paint(term, hdc, 
               (p.rcPaint.left-offset_width)/font_width,
               (p.rcPaint.top-offset_height)/font_height,
               (p.rcPaint.right-offset_width-1)/font_width,
               (p.rcPaint.bottom-offset_height-1)/font_height,
               !term->window_update_pending);

        if (p.fErase ||
            p.rcPaint.left  < offset_width  ||
        p.rcPaint.top   < offset_height ||
        p.rcPaint.right >= offset_width + font_width*term->cols ||
        p.rcPaint.bottom>= offset_height + font_height*term->rows)
        {
        HBRUSH fillcolour, oldbrush;
        HPEN   edge, oldpen;
        fillcolour = CreateSolidBrush (
                    colours[ATTR_DEFBG>>ATTR_BGSHIFT]);
        oldbrush = SelectObject(hdc, fillcolour);
        edge = CreatePen(PS_SOLID, 0, 
                    colours[ATTR_DEFBG>>ATTR_BGSHIFT]);
        oldpen = SelectObject(hdc, edge);

        /*
         * Jordan Russell reports that this apparently
         * ineffectual IntersectClipRect() call masks a
         * Windows NT/2K bug causing strange display
         * problems when the PuTTY window is taller than
         * the primary monitor. It seems harmless enough...
         */
        IntersectClipRect(hdc,
            p.rcPaint.left, p.rcPaint.top,
            p.rcPaint.right, p.rcPaint.bottom);

        ExcludeClipRect(hdc, 
            offset_width, offset_height,
            offset_width+font_width*term->cols,
            offset_height+font_height*term->rows);

        Rectangle(hdc, p.rcPaint.left, p.rcPaint.top, 
              p.rcPaint.right, p.rcPaint.bottom);

        /* SelectClipRgn(hdc, NULL); */

        SelectObject(hdc, oldbrush);
        DeleteObject(fillcolour);
        SelectObject(hdc, oldpen);
        DeleteObject(edge);
        }
        SelectObject(hdc, GetStockObject(SYSTEM_FONT));
        SelectObject(hdc, GetStockObject(WHITE_PEN));
        EndPaint(hwnd, &p);
        ShowCaret(hwnd);
    }
    return 0;
      case WM_NETEVENT:
    /* Notice we can get multiple netevents, FD_READ, FD_WRITE etc
     * but the only one that's likely to try to overload us is FD_READ.
     * This means buffering just one is fine.
     */
    if (pending_netevent)
        enact_pending_netevent();

    pending_netevent = TRUE;
    pend_netevent_wParam = wParam;
    pend_netevent_lParam = lParam;
    if (WSAGETSELECTEVENT(lParam) != FD_READ)
        enact_pending_netevent();

    net_pending_errors();
    return 0;
      case WM_SETFOCUS:
    term_set_focus(term, TRUE);
    CreateCaret(hwnd, caretbm, font_width, font_height);
    ShowCaret(hwnd);
    flash_window(0);           /* stop */
    compose_state = 0;
    term_update(term);
    break;
      case WM_KILLFOCUS:
    show_mouseptr(1);
    term_set_focus(term, FALSE);
    DestroyCaret();
    caret_x = caret_y = -1;           /* ensure caret is replaced next time */
    term_update(term);
    break;
      case WM_ENTERSIZEMOVE:
#ifdef RDB_DEBUG_PATCH
    debug((27, "WM_ENTERSIZEMOVE"));
#endif
    EnableSizeTip(1);
    resizing = TRUE;
    need_backend_resize = FALSE;
    break;
      case WM_EXITSIZEMOVE:
    EnableSizeTip(0);
    resizing = FALSE;
#ifdef RDB_DEBUG_PATCH
    debug((27, "WM_EXITSIZEMOVE"));
#endif
    if (need_backend_resize) {
        term_size(term, cfg.height, cfg.width, cfg.savelines);
        InvalidateRect(hwnd, NULL, TRUE);
    }
    break;
      case WM_SIZING:
    /*
     * This does two jobs:
     * 1) Keep the sizetip uptodate
     * 2) Make sure the window size is _stepped_ in units of the font size.
     */
        if (cfg.resize_action == RESIZE_TERM ||
            (cfg.resize_action == RESIZE_EITHER && !is_alt_pressed())) {
        int width, height, w, h, ew, eh;
        LPRECT r = (LPRECT) lParam;

        if ( !need_backend_resize && cfg.resize_action == RESIZE_EITHER &&
            (cfg.height != term->rows || cfg.width != term->cols )) {
        /* 
         * Great! It seems that both the terminal size and the
         * font size have been changed and the user is now dragging.
         * 
         * It will now be difficult to get back to the configured
         * font size!
         *
         * This would be easier but it seems to be too confusing.

        term_size(term, cfg.height, cfg.width, cfg.savelines);
        reset_window(2);
         */
            cfg.height=term->rows; cfg.width=term->cols;

        InvalidateRect(hwnd, NULL, TRUE);
        need_backend_resize = TRUE;
        }

        width = r->right - r->left - extra_width;
        height = r->bottom - r->top - extra_height;
        w = (width + font_width / 2) / font_width;
        if (w < 1)
        w = 1;
        h = (height + font_height / 2) / font_height;
        if (h < 1)
        h = 1;
        UpdateSizeTip(hwnd, w, h);
        ew = width - w * font_width;
        eh = height - h * font_height;
        if (ew != 0) {
        if (wParam == WMSZ_LEFT ||
            wParam == WMSZ_BOTTOMLEFT || wParam == WMSZ_TOPLEFT)
            r->left += ew;
        else
            r->right -= ew;
        }
        if (eh != 0) {
        if (wParam == WMSZ_TOP ||
            wParam == WMSZ_TOPRIGHT || wParam == WMSZ_TOPLEFT)
            r->top += eh;
        else
            r->bottom -= eh;
        }
        if (ew || eh)
        return 1;
        else
        return 0;
    } else {
        int width, height, w, h, rv = 0;
        int ex_width = extra_width + (cfg.window_border - offset_width) * 2;
        int ex_height = extra_height + (cfg.window_border - offset_height) * 2;
        LPRECT r = (LPRECT) lParam;

        width = r->right - r->left - ex_width;
        height = r->bottom - r->top - ex_height;

        w = (width + term->cols/2)/term->cols;
        h = (height + term->rows/2)/term->rows;
        if ( r->right != r->left + w*term->cols + ex_width)
        rv = 1;

        if (wParam == WMSZ_LEFT ||
        wParam == WMSZ_BOTTOMLEFT || wParam == WMSZ_TOPLEFT)
        r->left = r->right - w*term->cols - ex_width;
        else
        r->right = r->left + w*term->cols + ex_width;

        if (r->bottom != r->top + h*term->rows + ex_height)
        rv = 1;

        if (wParam == WMSZ_TOP ||
        wParam == WMSZ_TOPRIGHT || wParam == WMSZ_TOPLEFT)
        r->top = r->bottom - h*term->rows - ex_height;
        else
        r->bottom = r->top + h*term->rows + ex_height;

        return rv;
    }
    /* break;  (never reached) */
      case WM_FULLSCR_ON_MAX:
    fullscr_on_max = TRUE;
    break;
      case WM_MOVE:
    sys_cursor_update();
    break;
      case WM_SIZE:
#ifdef RDB_DEBUG_PATCH
    debug((27, "WM_SIZE %s (%d,%d)",
        (wParam == SIZE_MINIMIZED) ? "SIZE_MINIMIZED":
        (wParam == SIZE_MAXIMIZED) ? "SIZE_MAXIMIZED":
        (wParam == SIZE_RESTORED && resizing) ? "to":
        (wParam == SIZE_RESTORED) ? "SIZE_RESTORED":
        "...",
        LOWORD(lParam), HIWORD(lParam)));
#endif
    if (wParam == SIZE_MINIMIZED)
        SetWindowText(hwnd,
              cfg.win_name_always ? window_name : icon_name);
    if (wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED)
        SetWindowText(hwnd, window_name);
        if (wParam == SIZE_RESTORED) {
            processed_resize = FALSE;
            clear_full_screen();
            if (processed_resize) {
                /*
                 * Inhibit normal processing of this WM_SIZE; a
                 * secondary one was triggered just now by
                 * clear_full_screen which contained the correct
                 * client area size.
                 */
                return 0;
            }
        }
        if (wParam == SIZE_MAXIMIZED && fullscr_on_max) {
            fullscr_on_max = FALSE;
            processed_resize = FALSE;
            make_full_screen();
            if (processed_resize) {
                /*
                 * Inhibit normal processing of this WM_SIZE; a
                 * secondary one was triggered just now by
                 * make_full_screen which contained the correct client
                 * area size.
                 */
                return 0;
            }
        }

        processed_resize = TRUE;

    if (cfg.resize_action == RESIZE_DISABLED) {
        /* A resize, well it better be a minimize. */
        reset_window(-1);
    } else {

        int width, height, w, h;

        width = LOWORD(lParam);
        height = HIWORD(lParam);

            if (wParam == SIZE_MAXIMIZED && !was_zoomed) {
                was_zoomed = 1;
                prev_rows = term->rows;
                prev_cols = term->cols;
                if (cfg.resize_action == RESIZE_TERM) {
                    w = width / font_width;
                    if (w < 1) w = 1;
                    h = height / font_height;
                    if (h < 1) h = 1;

                    term_size(term, h, w, cfg.savelines);
                }
                reset_window(0);
            } else if (wParam == SIZE_RESTORED && was_zoomed) {
                was_zoomed = 0;
                if (cfg.resize_action == RESIZE_TERM) {
                    w = (width-cfg.window_border*2) / font_width;
                    if (w < 1) w = 1;
                    h = (height-cfg.window_border*2) / font_height;
                    if (h < 1) h = 1;
                    term_size(term, h, w, cfg.savelines);
                    reset_window(2);
                } else if (cfg.resize_action != RESIZE_FONT)
                    reset_window(2);
                else
                    reset_window(0);
            } else if (wParam == SIZE_MINIMIZED) {
                /* do nothing */
        } else if (cfg.resize_action == RESIZE_TERM ||
                       (cfg.resize_action == RESIZE_EITHER &&
                        !is_alt_pressed())) {
                w = (width-cfg.window_border*2) / font_width;
                if (w < 1) w = 1;
                h = (height-cfg.window_border*2) / font_height;
                if (h < 1) h = 1;

                if (resizing) {
                    /*
                     * Don't call back->size in mid-resize. (To
                     * prevent massive numbers of resize events
                     * getting sent down the connection during an NT
                     * opaque drag.)
                     */
            need_backend_resize = TRUE;
            cfg.height = h;
            cfg.width = w;
                } else {
                    term_size(term, h, w, cfg.savelines);
                }
            } else {
                reset_window(0);
        }
    }
    sys_cursor_update();
    return 0;
      case WM_VSCROLL:
    switch (LOWORD(wParam)) {
      case SB_BOTTOM:
        term_scroll(term, -1, 0);
        break;
      case SB_TOP:
        term_scroll(term, +1, 0);
        break;
      case SB_LINEDOWN:
        term_scroll(term, 0, +1);
        break;
      case SB_LINEUP:
        term_scroll(term, 0, -1);
        break;
      case SB_PAGEDOWN:
        term_scroll(term, 0, +term->rows / 2);
        break;
      case SB_PAGEUP:
        term_scroll(term, 0, -term->rows / 2);
        break;
      case SB_THUMBPOSITION:
      case SB_THUMBTRACK:
        term_scroll(term, 1, HIWORD(wParam));
        break;
    }
    break;
      case WM_PALETTECHANGED:
    if ((HWND) wParam != hwnd && pal != NULL) {
        HDC hdc = get_ctx(NULL);
        if (hdc) {
        if (RealizePalette(hdc) > 0)
            UpdateColors(hdc);
        free_ctx(hdc);
        }
    }
    break;
      case WM_QUERYNEWPALETTE:
    if (pal != NULL) {
        HDC hdc = get_ctx(NULL);
        if (hdc) {
        if (RealizePalette(hdc) > 0)
            UpdateColors(hdc);
        free_ctx(hdc);
        return TRUE;
        }
    }
    return FALSE;
      case WM_KEYDOWN:
      case WM_SYSKEYDOWN:
      case WM_KEYUP:
      case WM_SYSKEYUP:
    /*
     * Add the scan code and keypress timing to the random
     * number noise.
     */
    noise_ultralight(lParam);

    /*
     * We don't do TranslateMessage since it disassociates the
     * resulting CHAR message from the KEYDOWN that sparked it,
     * which we occasionally don't want. Instead, we process
     * KEYDOWN, and call the Win32 translator functions so that
     * we get the translations under _our_ control.
     */
    {
        unsigned char buf[20];
        int len;

        if (wParam == VK_PROCESSKEY) { /* IME PROCESS key */
        if (message == WM_KEYDOWN) {
            MSG m;
            m.hwnd = hwnd;
            m.message = WM_KEYDOWN;
            m.wParam = wParam;
            m.lParam = lParam & 0xdfff;
            TranslateMessage(&m);
        } else break; /* pass to Windows for default processing */
        } else {
        len = TranslateKey(message, wParam, lParam, buf);
        if (len == -1)
            return DefWindowProc(hwnd, message, wParam, lParam);

        if (len != 0) {
            /*
             * Interrupt an ongoing paste. I'm not sure
             * this is sensible, but for the moment it's
             * preferable to having to faff about buffering
             * things.
             */
            term_nopaste(term);

            /*
             * We need not bother about stdin backlogs
             * here, because in GUI PuTTY we can't do
             * anything about it anyway; there's no means
             * of asking Windows to hold off on KEYDOWN
             * messages. We _have_ to buffer everything
             * we're sent.
             */
            term_seen_key_event(term);
            if (ldisc)
            ldisc_send(ldisc, buf, len, 1);
            show_mouseptr(0);
        }
        }
    }
    net_pending_errors();
    return 0;
      case WM_INPUTLANGCHANGE:
    /* wParam == Font number */
    /* lParam == Locale */
    set_input_locale((HKL)lParam);
    sys_cursor_update();
    break;
      case WM_IME_STARTCOMPOSITION:
    {
        HIMC hImc = ImmGetContext(hwnd);
        ImmSetCompositionFont(hImc, &lfont);
        ImmReleaseContext(hwnd, hImc);
    }
    break;
      case WM_IME_COMPOSITION:
    {
        HIMC hIMC;
        int n;
        char *buff;

        if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS || 
            osVersion.dwPlatformId == VER_PLATFORM_WIN32s) break; /* no Unicode */

        if ((lParam & GCS_RESULTSTR) == 0) /* Composition unfinished. */
        break; /* fall back to DefWindowProc */

        hIMC = ImmGetContext(hwnd);
        n = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);

        if (n > 0) {
        int i;
        buff = snewn(n, char);
        ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, buff, n);
        /*
         * Jaeyoun Chung reports that Korean character
         * input doesn't work correctly if we do a single
         * luni_send() covering the whole of buff. So
         * instead we luni_send the characters one by one.
         */
        term_seen_key_event(term);
        for (i = 0; i < n; i += 2) {
            if (ldisc)
            luni_send(ldisc, (unsigned short *)(buff+i), 1, 1);
        }
        free(buff);
        }
        ImmReleaseContext(hwnd, hIMC);
        return 1;
    }

      case WM_IME_CHAR:
    if (wParam & 0xFF00) {
        unsigned char buf[2];

        buf[1] = wParam;
        buf[0] = wParam >> 8;
        term_seen_key_event(term);
        if (ldisc)
        lpage_send(ldisc, kbd_codepage, buf, 2, 1);
    } else {
        char c = (unsigned char) wParam;
        term_seen_key_event(term);
        if (ldisc)
        lpage_send(ldisc, kbd_codepage, &c, 1, 1);
    }
    return (0);
      case WM_CHAR:
      case WM_SYSCHAR:
    /*
     * Nevertheless, we are prepared to deal with WM_CHAR
     * messages, should they crop up. So if someone wants to
     * post the things to us as part of a macro manoeuvre,
     * we're ready to cope.
     */
    {
        char c = (unsigned char)wParam;
        term_seen_key_event(term);
        if (ldisc)
        lpage_send(ldisc, CP_ACP, &c, 1, 1);
    }
    return 0;
      case WM_SYSCOLORCHANGE:
    if (cfg.system_colour) {
        /* Refresh palette from system colours. */
        /* XXX actually this zaps the entire palette. */
        systopalette();
        init_palette();
        /* Force a repaint of the terminal window. */
        term_invalidate(term);
    }
    break;
      case WM_AGENT_CALLBACK:
    {
        struct agent_callback *c = (struct agent_callback *)lParam;
        c->callback(c->callback_ctx, c->data, c->len);
        sfree(c);
    }
    return 0;
      case WM_GOT_CLIPDATA:
    if (process_clipdata((HGLOBAL)lParam, wParam))
        term_do_paste(term);
    return 0;
      default:
    if (message == wm_mousewheel || message == WM_MOUSEWHEEL) {
        int shift_pressed=0, control_pressed=0;

        if (message == WM_MOUSEWHEEL) {
        wheel_accumulator += (short)HIWORD(wParam);
        shift_pressed=LOWORD(wParam) & MK_SHIFT;
        control_pressed=LOWORD(wParam) & MK_CONTROL;
        } else {
        BYTE keys[256];
        wheel_accumulator += (int)wParam;
        if (GetKeyboardState(keys)!=0) {
            shift_pressed=keys[VK_SHIFT]&0x80;
            control_pressed=keys[VK_CONTROL]&0x80;
        }
        }

        /* process events when the threshold is reached */
        while (abs(wheel_accumulator) >= WHEEL_DELTA) {
        int b;

        /* reduce amount for next time */
        if (wheel_accumulator > 0) {
            b = MBT_WHEEL_UP;
            wheel_accumulator -= WHEEL_DELTA;
        } else if (wheel_accumulator < 0) {
            b = MBT_WHEEL_DOWN;
            wheel_accumulator += WHEEL_DELTA;
        } else
            break;

        if (send_raw_mouse &&
            !(cfg.mouse_override && shift_pressed)) {
            /* Mouse wheel position is in screen coordinates for
             * some reason */
            POINT p;
            p.x = X_POS(lParam); p.y = Y_POS(lParam);
            if (ScreenToClient(hwnd, &p)) {
            /* send a mouse-down followed by a mouse up */
            term_mouse(term, b, translate_button(b),
                   MA_CLICK,
                   TO_CHR_X(p.x),
                   TO_CHR_Y(p.y), shift_pressed,
                   control_pressed, is_alt_pressed());
            term_mouse(term, b, translate_button(b),
                   MA_RELEASE, TO_CHR_X(p.x),
                   TO_CHR_Y(p.y), shift_pressed,
                   control_pressed, is_alt_pressed());
            } /* else: not sure when this can fail */
        } else {
            /* trigger a scroll */
            term_scroll(term, 0,
                b == MBT_WHEEL_UP ?
                -term->rows / 2 : term->rows / 2);
        }
        }
        return 0;
    }
    }

    /*
     * Any messages we don't process completely above are passed through to
     * DefWindowProc() for default processing.
     */
#endif
    return DefWindowProc(hwnd, message, wParam, lParam);
}

/*
 * Move the system caret. (We maintain one, even though it's
 * invisible, for the benefit of blind people: apparently some
 * helper software tracks the system caret, so we should arrange to
 * have one.)
 */
void sys_cursor(void *frontend, int x, int y)
{
    int cx, cy;

    if (!term->has_focus) return;

    /*
     * Avoid gratuitously re-updating the cursor position and IMM
     * window if there's no actual change required.
     */
    cx = x * font_width + offset_width;
    cy = y * font_height + offset_height;
    if (cx == caret_x && cy == caret_y)
    return;
    caret_x = cx;
    caret_y = cy;

    sys_cursor_update();
}

static void sys_cursor_update(void)
{
    COMPOSITIONFORM cf;
    HIMC hIMC;

    if (!term->has_focus) return;

    if (caret_x < 0 || caret_y < 0)
    return;

    SetCaretPos(caret_x, caret_y);

    /* IMM calls on Win98 and beyond only */
    if(osVersion.dwPlatformId == VER_PLATFORM_WIN32s) return; /* 3.11 */
    
    if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS &&
        osVersion.dwMinorVersion == 0) return; /* 95 */

    /* we should have the IMM functions */
    hIMC = ImmGetContext(hwnd);
    cf.dwStyle = CFS_POINT;
    cf.ptCurrentPos.x = caret_x;
    cf.ptCurrentPos.y = caret_y;
    ImmSetCompositionWindow(hIMC, &cf);

    ImmReleaseContext(hwnd, hIMC);
}

/*
 * Draw a line of text in the window, at given character
 * coordinates, in given attributes.
 *
 * We are allowed to fiddle with the contents of `text'.
 */
void do_text_internal(Context ctx, int x, int y, wchar_t *text, int len,
              unsigned long attr, int lattr)
{
#if 0
    COLORREF fg, bg, t;
    int nfg, nbg, nfont;
    HDC hdc = ctx;
    RECT line_box;
    int force_manual_underline = 0;
    int fnt_width, char_width;
    int text_adjust = 0;
    int xoffset = 0;
    int maxlen, remaining, opaque;
    static int *lpDx = NULL;
    static int lpDx_len = 0;
    int *lpDx_maybe;

    lattr &= LATTR_MODE;

    char_width = fnt_width = font_width * (1 + (lattr != LATTR_NORM));

    if (attr & ATTR_WIDE)
    char_width *= 2;

    /* Only want the left half of double width lines */
    if (lattr != LATTR_NORM && x*2 >= term->cols)
    return;

    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_ACTCURS) && (cfg.cursor_type == 0 || term->big_cursor)) {
    attr &= ~(ATTR_REVERSE|ATTR_BLINK|ATTR_COLOURS);
    if (bold_mode == BOLD_COLOURS)
        attr &= ~ATTR_BOLD;

    /* cursor fg and bg */
    attr |= (260 << ATTR_FGSHIFT) | (261 << ATTR_BGSHIFT);
    }

    nfont = 0;
    if (cfg.vtmode == VT_POORMAN && lattr != LATTR_NORM) {
    /* Assume a poorman font is borken in other ways too. */
    lattr = LATTR_WIDE;
    } else
    switch (lattr) {
      case LATTR_NORM:
        break;
      case LATTR_WIDE:
        nfont |= FONT_WIDE;
        break;
      default:
        nfont |= FONT_WIDE + FONT_HIGH;
        break;
    }
    if (attr & ATTR_NARROW)
    nfont |= FONT_NARROW;

    /* Special hack for the VT100 linedraw glyphs. */
    if (text[0] >= 0x23BA && text[0] <= 0x23BD) {
    switch ((unsigned char) (text[0])) {
      case 0xBA:
        text_adjust = -2 * font_height / 5;
        break;
      case 0xBB:
        text_adjust = -1 * font_height / 5;
        break;
      case 0xBC:
        text_adjust = font_height / 5;
        break;
      case 0xBD:
        text_adjust = 2 * font_height / 5;
        break;
    }
    if (lattr == LATTR_TOP || lattr == LATTR_BOT)
        text_adjust *= 2;
    text[0] = ucsdata.unitab_xterm['q'];
    if (attr & ATTR_UNDER) {
        attr &= ~ATTR_UNDER;
        force_manual_underline = 1;
    }
    }

    /* Anything left as an original character set is unprintable. */
    if (DIRECT_CHAR(text[0])) {
    int i;
    for (i = 0; i < len; i++)
        text[i] = 0xFFFD;
    }

    /* OEM CP */
    if ((text[0] & CSET_MASK) == CSET_OEMCP)
    nfont |= FONT_OEM;

    nfg = ((attr & ATTR_FGMASK) >> ATTR_FGSHIFT);
    nbg = ((attr & ATTR_BGMASK) >> ATTR_BGSHIFT);
    if (bold_mode == BOLD_FONT && (attr & ATTR_BOLD))
    nfont |= FONT_BOLD;
    if (und_mode == UND_FONT && (attr & ATTR_UNDER))
    nfont |= FONT_UNDERLINE;
    another_font(nfont);
    if (!fonts[nfont]) {
    if (nfont & FONT_UNDERLINE)
        force_manual_underline = 1;
    /* Don't do the same for manual bold, it could be bad news. */

    nfont &= ~(FONT_BOLD | FONT_UNDERLINE);
    }
    another_font(nfont);
    if (!fonts[nfont])
    nfont = FONT_NORMAL;
    if (attr & ATTR_REVERSE) {
    t = nfg;
    nfg = nbg;
    nbg = t;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BOLD)) {
    if (nfg < 16) nfg |= 8;
    else if (nfg >= 256) nfg |= 1;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BLINK)) {
    if (nbg < 16) nbg |= 8;
    else if (nbg >= 256) nbg |= 1;
    }
    fg = colours[nfg];
    bg = colours[nbg];
    SelectObject(hdc, fonts[nfont]);
    SetTextColor(hdc, fg);
    SetBkColor(hdc, bg);
    if (attr & TATTR_COMBINING)
    SetBkMode(hdc, TRANSPARENT);
    else
    SetBkMode(hdc, OPAQUE);
    line_box.left = x;
    line_box.top = y;
    line_box.right = x + char_width * len;
    line_box.bottom = y + font_height;

    /* Only want the left half of double width lines */
    if (line_box.right > font_width*term->cols+offset_width)
    line_box.right = font_width*term->cols+offset_width;

    if (font_varpitch) {
        /*
         * If we're using a variable-pitch font, we unconditionally
         * draw the glyphs one at a time and centre them in their
         * character cells (which means in particular that we must
         * disable the lpDx mechanism). This gives slightly odd but
         * generally reasonable results.
         */
        xoffset = char_width / 2;
        SetTextAlign(hdc, TA_TOP | TA_CENTER | TA_NOUPDATECP);
        lpDx_maybe = NULL;
        maxlen = 1;
    } else {
        /*
         * In a fixed-pitch font, we draw the whole string in one go
         * in the normal way.
         */
        xoffset = 0;
        SetTextAlign(hdc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
        lpDx_maybe = lpDx;
        maxlen = len;
    }

    opaque = TRUE;                     /* start by erasing the rectangle */
    for (remaining = len; remaining > 0;
         text += len, remaining -= len, x += char_width * len) {
        len = (maxlen < remaining ? maxlen : remaining);

        if (len > lpDx_len) {
            if (len > lpDx_len) {
                lpDx_len = len * 9 / 8 + 16;
                lpDx = sresize(lpDx, lpDx_len, int);
            }
        }
        {
            int i;
            for (i = 0; i < len; i++)
                lpDx[i] = char_width;
        }

        /* We're using a private area for direct to font. (512 chars.) */
        if (ucsdata.dbcs_screenfont && (text[0] & CSET_MASK) == CSET_ACP) {
            /* Ho Hum, dbcs fonts are a PITA! */
            /* To display on W9x I have to convert to UCS */
            static wchar_t *uni_buf = 0;
            static int uni_len = 0;
            int nlen, mptr;
            if (len > uni_len) {
                sfree(uni_buf);
                uni_len = len;
                uni_buf = snewn(uni_len, wchar_t);
            }

            for(nlen = mptr = 0; mptr<len; mptr++) {
                uni_buf[nlen] = 0xFFFD;
                if (IsDBCSLeadByteEx(ucsdata.font_codepage,
                                     (BYTE) text[mptr])) {
                    char dbcstext[2];
                    dbcstext[0] = text[mptr] & 0xFF;
                    dbcstext[1] = text[mptr+1] & 0xFF;
                    lpDx[nlen] += char_width;
                    MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
                                        dbcstext, 2, uni_buf+nlen, 1);
                    mptr++;
                }
                else
                {
                    char dbcstext[1];
                    dbcstext[0] = text[mptr] & 0xFF;
                    MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
                                        dbcstext, 1, uni_buf+nlen, 1);
                }
                nlen++;
            }
            if (nlen <= 0)
                return;               /* Eeek! */

            ExtTextOutW(hdc, x + xoffset,
                        y - font_height * (lattr == LATTR_BOT) + text_adjust,
                        ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
                        &line_box, uni_buf, nlen,
                        lpDx_maybe);
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
                SetBkMode(hdc, TRANSPARENT);
                ExtTextOutW(hdc, x + xoffset - 1,
                            y - font_height * (lattr ==
                                               LATTR_BOT) + text_adjust,
                            ETO_CLIPPED, &line_box, uni_buf, nlen, lpDx_maybe);
            }

            lpDx[0] = -1;
        } else if (DIRECT_FONT(text[0])) {
            static char *directbuf = NULL;
            static int directlen = 0;
            int i;
            if (len > directlen) {
                directlen = len;
                directbuf = sresize(directbuf, directlen, char);
            }

            for (i = 0; i < len; i++)
                directbuf[i] = text[i] & 0xFF;

            ExtTextOut(hdc, x + xoffset,
                       y - font_height * (lattr == LATTR_BOT) + text_adjust,
                       ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
                       &line_box, directbuf, len, lpDx_maybe);
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
                SetBkMode(hdc, TRANSPARENT);

                /* GRR: This draws the character outside its box and
                 * can leave 'droppings' even with the clip box! I
                 * suppose I could loop it one character at a time ...
                 * yuk.
                 * 
                 * Or ... I could do a test print with "W", and use +1
                 * or -1 for this shift depending on if the leftmost
                 * column is blank...
                 */
                ExtTextOut(hdc, x + xoffset - 1,
                           y - font_height * (lattr ==
                                              LATTR_BOT) + text_adjust,
                           ETO_CLIPPED, &line_box, directbuf, len, lpDx_maybe);
            }
        } else {
            /* And 'normal' unicode characters */
            static WCHAR *wbuf = NULL;
            static int wlen = 0;
            int i;

            if (wlen < len) {
                sfree(wbuf);
                wlen = len;
                wbuf = snewn(wlen, WCHAR);
            }

            for (i = 0; i < len; i++)
                wbuf[i] = text[i];

            /* print Glyphs as they are, without Windows' Shaping*/
            general_textout(hdc, x + xoffset,
                            y - font_height * (lattr==LATTR_BOT) + text_adjust,
                            &line_box, wbuf, len, lpDx,
                            opaque && !(attr & TATTR_COMBINING));

            /* And the shadow bold hack. */
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
                SetBkMode(hdc, TRANSPARENT);
                ExtTextOutW(hdc, x + xoffset - 1,
                            y - font_height * (lattr ==
                                               LATTR_BOT) + text_adjust,
                            ETO_CLIPPED, &line_box, wbuf, len, lpDx_maybe);
            }
        }

        /*
         * If we're looping round again, stop erasing the background
         * rectangle.
         */
        SetBkMode(hdc, TRANSPARENT);
        opaque = FALSE;
    }
    if (lattr != LATTR_TOP && (force_manual_underline ||
                   (und_mode == UND_LINE
                && (attr & ATTR_UNDER)))) {
    HPEN oldpen;
    int dec = descent;
    if (lattr == LATTR_BOT)
        dec = dec * 2 - font_height;

    oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, fg));
    MoveToEx(hdc, x, y + dec, NULL);
    LineTo(hdc, x + len * char_width, y + dec);
    oldpen = SelectObject(hdc, oldpen);
    DeleteObject(oldpen);
    }
#endif
}

/*
 * Wrapper that handles combining characters.
 */
void do_text(Context ctx, int x, int y, wchar_t *text, int len,
         unsigned long attr, int lattr)
{
    if (attr & TATTR_COMBINING) {
    unsigned long a = 0;
    attr &= ~TATTR_COMBINING;
    while (len--) {
        do_text_internal(ctx, x, y, text, 1, attr | a, lattr);
        text++;
        a = TATTR_COMBINING;
    }
    } else
    do_text_internal(ctx, x, y, text, len, attr, lattr);
}

void do_cursor(Context ctx, int x, int y, wchar_t *text, int len,
           unsigned long attr, int lattr)
{

    int fnt_width;
    int char_width;
    HDC hdc = ctx;
    int ctype = cfg.cursor_type;

    lattr &= LATTR_MODE;

    if ((attr & TATTR_ACTCURS) && (ctype == 0 || term->big_cursor)) {
    if (*text != UCSWIDE) {
        do_text(ctx, x, y, text, len, attr, lattr);
        return;
    }
    ctype = 2;
    attr |= TATTR_RIGHTCURS;
    }

    fnt_width = char_width = font_width * (1 + (lattr != LATTR_NORM));
    if (attr & ATTR_WIDE)
    char_width *= 2;
    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_PASCURS) && (ctype == 0 || term->big_cursor)) {
    POINT pts[5];
    HPEN oldpen;
    pts[0].x = pts[1].x = pts[4].x = x;
    pts[2].x = pts[3].x = x + char_width - 1;
    pts[0].y = pts[3].y = pts[4].y = y;
    pts[1].y = pts[2].y = y + font_height - 1;
    oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, colours[261]));
    Polyline(hdc, pts, 5);
    oldpen = SelectObject(hdc, oldpen);
    DeleteObject(oldpen);
    } else if ((attr & (TATTR_ACTCURS | TATTR_PASCURS)) && ctype != 0) {
    int startx, starty, dx, dy, length, i;
    if (ctype == 1) {
        startx = x;
        starty = y + descent;
        dx = 1;
        dy = 0;
        length = char_width;
    } else {
        int xadjust = 0;
        if (attr & TATTR_RIGHTCURS)
        xadjust = char_width - 1;
        startx = x + xadjust;
        starty = y;
        dx = 0;
        dy = 1;
        length = font_height;
    }
    if (attr & TATTR_ACTCURS) {
        HPEN oldpen;
        oldpen =
        SelectObject(hdc, CreatePen(PS_SOLID, 0, colours[261]));
        MoveToEx(hdc, startx, starty, NULL);
        LineTo(hdc, startx + dx * length, starty + dy * length);
        oldpen = SelectObject(hdc, oldpen);
        DeleteObject(oldpen);
    } else {
        for (i = 0; i < length; i++) {
        if (i % 2 == 0) {
            SetPixel(hdc, startx, starty, colours[261]);
        }
        startx += dx;
        starty += dy;
        }
    }
    }
}

/* This function gets the actual width of a character in the normal font.
 */
int char_width(Context ctx, int uc) {
    HDC hdc = ctx;
    int ibuf = 0;

    /* If the font max is the same as the font ave width then this
     * function is a no-op.
     */
    if (!font_dualwidth) return 1;

    switch (uc & CSET_MASK) {
      case CSET_ASCII:
    uc = ucsdata.unitab_line[uc & 0xFF];
    break;
      case CSET_LINEDRW:
    uc = ucsdata.unitab_xterm[uc & 0xFF];
    break;
      case CSET_SCOACS:
    uc = ucsdata.unitab_scoacs[uc & 0xFF];
    break;
    }
    if (DIRECT_FONT(uc)) {
    if (ucsdata.dbcs_screenfont) return 1;

    /* Speedup, I know of no font where ascii is the wrong width */
    if ((uc&~CSET_MASK) >= ' ' && (uc&~CSET_MASK)<= '~')
        return 1;

    if ( (uc & CSET_MASK) == CSET_ACP ) {
        SelectObject(hdc, fonts[FONT_NORMAL]);
    } else if ( (uc & CSET_MASK) == CSET_OEMCP ) {
        another_font(FONT_OEM);
        if (!fonts[FONT_OEM]) return 0;

        SelectObject(hdc, fonts[FONT_OEM]);
    } else
        return 0;

    if ( GetCharWidth32(hdc, uc&~CSET_MASK, uc&~CSET_MASK, &ibuf) != 1 &&
         GetCharWidth(hdc, uc&~CSET_MASK, uc&~CSET_MASK, &ibuf) != 1)
        return 0;
    } else {
    /* Speedup, I know of no font where ascii is the wrong width */
    if (uc >= ' ' && uc <= '~') return 1;

    SelectObject(hdc, fonts[FONT_NORMAL]);
    if ( GetCharWidth32W(hdc, uc, uc, &ibuf) == 1 )
        /* Okay that one worked */ ;
    else if ( GetCharWidthW(hdc, uc, uc, &ibuf) == 1 )
        /* This should work on 9x too, but it's "less accurate" */ ;
    else
        return 0;
    }

    ibuf += font_width / 2 -1;
    ibuf /= font_width;

    return ibuf;
}

/*
 * Translate a WM_(SYS)?KEY(UP|DOWN) message into a string of ASCII
 * codes. Returns number of bytes used, zero to drop the message,
 * -1 to forward the message to Windows, or another negative number
 * to indicate a NUL-terminated "special" string.
 */
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam,
            unsigned char *output)
{
#if 0
    BYTE keystate[256];
    int scan, left_alt = 0, key_down, shift_state;
    int r, i, code;
    unsigned char *p = output;
    static int alt_sum = 0;

    HKL kbd_layout = GetKeyboardLayout(0);

    /* keys is for ToAsciiEx. There's some ick here, see below. */
    static WORD keys[3];
    static int compose_char = 0;
    static WPARAM compose_key = 0;

    r = GetKeyboardState(keystate);
    if (!r)
    memset(keystate, 0, sizeof(keystate));
    else {
#if 0
#define SHOW_TOASCII_RESULT
    {                   /* Tell us all about key events */
        static BYTE oldstate[256];
        static int first = 1;
        static int scan;
        int ch;
        if (first)
        memcpy(oldstate, keystate, sizeof(oldstate));
        first = 0;

        if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT) {
        debug(("+"));
        } else if ((HIWORD(lParam) & KF_UP)
               && scan == (HIWORD(lParam) & 0xFF)) {
        debug((". U"));
        } else {
        debug((".\n"));
        if (wParam >= VK_F1 && wParam <= VK_F20)
            debug(("K_F%d", wParam + 1 - VK_F1));
        else
            switch (wParam) {
              case VK_SHIFT:
            debug(("SHIFT"));
            break;
              case VK_CONTROL:
            debug(("CTRL"));
            break;
              case VK_MENU:
            debug(("ALT"));
            break;
              default:
            debug(("VK_%02x", wParam));
            }
        if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP)
            debug(("*"));
        debug((", S%02x", scan = (HIWORD(lParam) & 0xFF)));

        ch = MapVirtualKeyEx(wParam, 2, kbd_layout);
        if (ch >= ' ' && ch <= '~')
            debug((", '%c'", ch));
        else if (ch)
            debug((", $%02x", ch));

        if (keys[0])
            debug((", KB0=%02x", keys[0]));
        if (keys[1])
            debug((", KB1=%02x", keys[1]));
        if (keys[2])
            debug((", KB2=%02x", keys[2]));

        if ((keystate[VK_SHIFT] & 0x80) != 0)
            debug((", S"));
        if ((keystate[VK_CONTROL] & 0x80) != 0)
            debug((", C"));
        if ((HIWORD(lParam) & KF_EXTENDED))
            debug((", E"));
        if ((HIWORD(lParam) & KF_UP))
            debug((", U"));
        }

        if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT);
        else if ((HIWORD(lParam) & KF_UP))
        oldstate[wParam & 0xFF] ^= 0x80;
        else
        oldstate[wParam & 0xFF] ^= 0x81;

        for (ch = 0; ch < 256; ch++)
        if (oldstate[ch] != keystate[ch])
            debug((", M%02x=%02x", ch, keystate[ch]));

        memcpy(oldstate, keystate, sizeof(oldstate));
    }
#endif

    if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED)) {
        keystate[VK_RMENU] = keystate[VK_MENU];
    }


    /* Nastyness with NUMLock - Shift-NUMLock is left alone though */
    if ((cfg.funky_type == FUNKY_VT400 ||
         (cfg.funky_type <= FUNKY_LINUX && term->app_keypad_keys &&
          !cfg.no_applic_k))
        && wParam == VK_NUMLOCK && !(keystate[VK_SHIFT] & 0x80)) {

        wParam = VK_EXECUTE;

        /* UnToggle NUMLock */
        if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == 0)
        keystate[VK_NUMLOCK] ^= 1;
    }

    /* And write back the 'adjusted' state */
    SetKeyboardState(keystate);
    }

    /* Disable Auto repeat if required */
    if (term->repeat_off &&
    (HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT)
    return 0;

    if ((HIWORD(lParam) & KF_ALTDOWN) && (keystate[VK_RMENU] & 0x80) == 0)
    left_alt = 1;

    key_down = ((HIWORD(lParam) & KF_UP) == 0);

    /* Make sure Ctrl-ALT is not the same as AltGr for ToAscii unless told. */
    if (left_alt && (keystate[VK_CONTROL] & 0x80)) {
    if (cfg.ctrlaltkeys)
        keystate[VK_MENU] = 0;
    else {
        keystate[VK_RMENU] = 0x80;
        left_alt = 0;
    }
    }

    scan = (HIWORD(lParam) & (KF_UP | KF_EXTENDED | 0xFF));
    shift_state = ((keystate[VK_SHIFT] & 0x80) != 0)
    + ((keystate[VK_CONTROL] & 0x80) != 0) * 2;

    /* Note if AltGr was pressed and if it was used as a compose key */
    if (!compose_state) {
    compose_key = 0x100;
    if (cfg.compose_key) {
        if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED))
        compose_key = wParam;
    }
    if (wParam == VK_APPS)
        compose_key = wParam;
    }

    if (wParam == compose_key) {
    if (compose_state == 0
        && (HIWORD(lParam) & (KF_UP | KF_REPEAT)) == 0) compose_state =
        1;
    else if (compose_state == 1 && (HIWORD(lParam) & KF_UP))
        compose_state = 2;
    else
        compose_state = 0;
    } else if (compose_state == 1 && wParam != VK_CONTROL)
    compose_state = 0;

    if (compose_state > 1 && left_alt)
    compose_state = 0;

    /* Sanitize the number pad if not using a PC NumPad */
    if (left_alt || (term->app_keypad_keys && !cfg.no_applic_k
             && cfg.funky_type != FUNKY_XTERM)
    || cfg.funky_type == FUNKY_VT400 || cfg.nethack_keypad || compose_state) {
    if ((HIWORD(lParam) & KF_EXTENDED) == 0) {
        int nParam = 0;
        switch (wParam) {
          case VK_INSERT:
        nParam = VK_NUMPAD0;
        break;
          case VK_END:
        nParam = VK_NUMPAD1;
        break;
          case VK_DOWN:
        nParam = VK_NUMPAD2;
        break;
          case VK_NEXT:
        nParam = VK_NUMPAD3;
        break;
          case VK_LEFT:
        nParam = VK_NUMPAD4;
        break;
          case VK_CLEAR:
        nParam = VK_NUMPAD5;
        break;
          case VK_RIGHT:
        nParam = VK_NUMPAD6;
        break;
          case VK_HOME:
        nParam = VK_NUMPAD7;
        break;
          case VK_UP:
        nParam = VK_NUMPAD8;
        break;
          case VK_PRIOR:
        nParam = VK_NUMPAD9;
        break;
          case VK_DELETE:
        nParam = VK_DECIMAL;
        break;
        }
        if (nParam) {
        if (keystate[VK_NUMLOCK] & 1)
            shift_state |= 1;
        wParam = nParam;
        }
    }
    }

    /* If a key is pressed and AltGr is not active */
    if (key_down && (keystate[VK_RMENU] & 0x80) == 0 && !compose_state) {
    /* Okay, prepare for most alts then ... */
    if (left_alt)
        *p++ = '\033';

    /* Lets see if it's a pattern we know all about ... */
    if (wParam == VK_PRIOR && shift_state == 1) {
        SendMessage(hwnd, WM_VSCROLL, SB_PAGEUP, 0);
        return 0;
    }
    if (wParam == VK_PRIOR && shift_state == 2) {
        SendMessage(hwnd, WM_VSCROLL, SB_LINEUP, 0);
        return 0;
    }
    if (wParam == VK_NEXT && shift_state == 1) {
        SendMessage(hwnd, WM_VSCROLL, SB_PAGEDOWN, 0);
        return 0;
    }
    if (wParam == VK_NEXT && shift_state == 2) {
        SendMessage(hwnd, WM_VSCROLL, SB_LINEDOWN, 0);
        return 0;
    }
    if ((wParam == VK_PRIOR || wParam == VK_NEXT) && shift_state == 3) {
        term_scroll_to_selection(term, (wParam == VK_PRIOR ? 0 : 1));
        return 0;
    }
    if (wParam == VK_INSERT && shift_state == 1) {
        request_paste(NULL);
        return 0;
    }
    if (left_alt && wParam == VK_F4 && cfg.alt_f4) {
        return -1;
    }
    if (left_alt && wParam == VK_SPACE && cfg.alt_space) {
        SendMessage(hwnd, WM_SYSCOMMAND, SC_KEYMENU, 0);
        return -1;
    }
    if (left_alt && wParam == VK_RETURN && cfg.fullscreenonaltenter &&
        (cfg.resize_action != RESIZE_DISABLED)) {
         if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) != KF_REPEAT)
         flip_full_screen();
        return -1;
    }
    /* Control-Numlock for app-keypad mode switch */
    if (wParam == VK_PAUSE && shift_state == 2) {
        term->app_keypad_keys ^= 1;
        return 0;
    }

    /* Nethack keypad */
    if (cfg.nethack_keypad && !left_alt) {
        switch (wParam) {
          case VK_NUMPAD1:
        *p++ = "bB\002\002"[shift_state & 3];
        return p - output;
          case VK_NUMPAD2:
        *p++ = "jJ\012\012"[shift_state & 3];
        return p - output;
          case VK_NUMPAD3:
        *p++ = "nN\016\016"[shift_state & 3];
        return p - output;
          case VK_NUMPAD4:
        *p++ = "hH\010\010"[shift_state & 3];
        return p - output;
          case VK_NUMPAD5:
        *p++ = shift_state ? '.' : '.';
        return p - output;
          case VK_NUMPAD6:
        *p++ = "lL\014\014"[shift_state & 3];
        return p - output;
          case VK_NUMPAD7:
        *p++ = "yY\031\031"[shift_state & 3];
        return p - output;
          case VK_NUMPAD8:
        *p++ = "kK\013\013"[shift_state & 3];
        return p - output;
          case VK_NUMPAD9:
        *p++ = "uU\025\025"[shift_state & 3];
        return p - output;
        }
    }

    /* Application Keypad */
    if (!left_alt) {
        int xkey = 0;

        if (cfg.funky_type == FUNKY_VT400 ||
        (cfg.funky_type <= FUNKY_LINUX &&
         term->app_keypad_keys && !cfg.no_applic_k)) switch (wParam) {
          case VK_EXECUTE:
            xkey = 'P';
            break;
          case VK_DIVIDE:
            xkey = 'Q';
            break;
          case VK_MULTIPLY:
            xkey = 'R';
            break;
          case VK_SUBTRACT:
            xkey = 'S';
            break;
        }
        if (term->app_keypad_keys && !cfg.no_applic_k)
        switch (wParam) {
          case VK_NUMPAD0:
            xkey = 'p';
            break;
          case VK_NUMPAD1:
            xkey = 'q';
            break;
          case VK_NUMPAD2:
            xkey = 'r';
            break;
          case VK_NUMPAD3:
            xkey = 's';
            break;
          case VK_NUMPAD4:
            xkey = 't';
            break;
          case VK_NUMPAD5:
            xkey = 'u';
            break;
          case VK_NUMPAD6:
            xkey = 'v';
            break;
          case VK_NUMPAD7:
            xkey = 'w';
            break;
          case VK_NUMPAD8:
            xkey = 'x';
            break;
          case VK_NUMPAD9:
            xkey = 'y';
            break;

          case VK_DECIMAL:
            xkey = 'n';
            break;
          case VK_ADD:
            if (cfg.funky_type == FUNKY_XTERM) {
            if (shift_state)
                xkey = 'l';
            else
                xkey = 'k';
            } else if (shift_state)
            xkey = 'm';
            else
            xkey = 'l';
            break;

          case VK_DIVIDE:
            if (cfg.funky_type == FUNKY_XTERM)
            xkey = 'o';
            break;
          case VK_MULTIPLY:
            if (cfg.funky_type == FUNKY_XTERM)
            xkey = 'j';
            break;
          case VK_SUBTRACT:
            if (cfg.funky_type == FUNKY_XTERM)
            xkey = 'm';
            break;

          case VK_RETURN:
            if (HIWORD(lParam) & KF_EXTENDED)
            xkey = 'M';
            break;
        }
        if (xkey) {
        if (term->vt52_mode) {
            if (xkey >= 'P' && xkey <= 'S')
            p += sprintf((char *) p, "\x1B%c", xkey);
            else
            p += sprintf((char *) p, "\x1B?%c", xkey);
        } else
            p += sprintf((char *) p, "\x1BO%c", xkey);
        return p - output;
        }
    }

    if (wParam == VK_BACK && shift_state == 0) {    /* Backspace */
        *p++ = (cfg.bksp_is_delete ? 0x7F : 0x08);
        *p++ = 0;
        return -2;
    }
    if (wParam == VK_BACK && shift_state == 1) {    /* Shift Backspace */
        /* We do the opposite of what is configured */
        *p++ = (cfg.bksp_is_delete ? 0x08 : 0x7F);
        *p++ = 0;
        return -2;
    }
    if (wParam == VK_TAB && shift_state == 1) {    /* Shift tab */
        *p++ = 0x1B;
        *p++ = '[';
        *p++ = 'Z';
        return p - output;
    }
    if (wParam == VK_SPACE && shift_state == 2) {    /* Ctrl-Space */
        *p++ = 0;
        return p - output;
    }
    if (wParam == VK_SPACE && shift_state == 3) {    /* Ctrl-Shift-Space */
        *p++ = 160;
        return p - output;
    }
    if (wParam == VK_CANCEL && shift_state == 2) {    /* Ctrl-Break */
        if (back)
        back->special(backhandle, TS_BRK);
        return 0;
    }
    if (wParam == VK_PAUSE) {      /* Break/Pause */
        *p++ = 26;
        *p++ = 0;
        return -2;
    }
    /* Control-2 to Control-8 are special */
    if (shift_state == 2 && wParam >= '2' && wParam <= '8') {
        *p++ = "\000\033\034\035\036\037\177"[wParam - '2'];
        return p - output;
    }
    if (shift_state == 2 && (wParam == 0xBD || wParam == 0xBF)) {
        *p++ = 0x1F;
        return p - output;
    }
    if (shift_state == 2 && (wParam == 0xDF || wParam == 0xDC)) {
        *p++ = 0x1C;
        return p - output;
    }
    if (shift_state == 3 && wParam == 0xDE) {
        *p++ = 0x1E;           /* Ctrl-~ == Ctrl-^ in xterm at least */
        return p - output;
    }
    if (shift_state == 0 && wParam == VK_RETURN && term->cr_lf_return) {
        *p++ = '\r';
        *p++ = '\n';
        return p - output;
    }

    /*
     * Next, all the keys that do tilde codes. (ESC '[' nn '~',
     * for integer decimal nn.)
     *
     * We also deal with the weird ones here. Linux VCs replace F1
     * to F5 by ESC [ [ A to ESC [ [ E. rxvt doesn't do _that_, but
     * does replace Home and End (1~ and 4~) by ESC [ H and ESC O w
     * respectively.
     */
    code = 0;
    switch (wParam) {
      case VK_F1:
        code = (keystate[VK_SHIFT] & 0x80 ? 23 : 11);
        break;
      case VK_F2:
        code = (keystate[VK_SHIFT] & 0x80 ? 24 : 12);
        break;
      case VK_F3:
        code = (keystate[VK_SHIFT] & 0x80 ? 25 : 13);
        break;
      case VK_F4:
        code = (keystate[VK_SHIFT] & 0x80 ? 26 : 14);
        break;
      case VK_F5:
        code = (keystate[VK_SHIFT] & 0x80 ? 28 : 15);
        break;
      case VK_F6:
        code = (keystate[VK_SHIFT] & 0x80 ? 29 : 17);
        break;
      case VK_F7:
        code = (keystate[VK_SHIFT] & 0x80 ? 31 : 18);
        break;
      case VK_F8:
        code = (keystate[VK_SHIFT] & 0x80 ? 32 : 19);
        break;
      case VK_F9:
        code = (keystate[VK_SHIFT] & 0x80 ? 33 : 20);
        break;
      case VK_F10:
        code = (keystate[VK_SHIFT] & 0x80 ? 34 : 21);
        break;
      case VK_F11:
        code = 23;
        break;
      case VK_F12:
        code = 24;
        break;
      case VK_F13:
        code = 25;
        break;
      case VK_F14:
        code = 26;
        break;
      case VK_F15:
        code = 28;
        break;
      case VK_F16:
        code = 29;
        break;
      case VK_F17:
        code = 31;
        break;
      case VK_F18:
        code = 32;
        break;
      case VK_F19:
        code = 33;
        break;
      case VK_F20:
        code = 34;
        break;
    }
    if ((shift_state&2) == 0) switch (wParam) {
      case VK_HOME:
        code = 1;
        break;
      case VK_INSERT:
        code = 2;
        break;
      case VK_DELETE:
        code = 3;
        break;
      case VK_END:
        code = 4;
        break;
      case VK_PRIOR:
        code = 5;
        break;
      case VK_NEXT:
        code = 6;
        break;
    }
    /* Reorder edit keys to physical order */
    if (cfg.funky_type == FUNKY_VT400 && code <= 6)
        code = "\0\2\1\4\5\3\6"[code];

    if (term->vt52_mode && code > 0 && code <= 6) {
        p += sprintf((char *) p, "\x1B%c", " HLMEIG"[code]);
        return p - output;
    }

    if (cfg.funky_type == FUNKY_SCO &&     /* SCO function keys */
        code >= 11 && code <= 34) {
        char codes[] = "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
        int index = 0;
        switch (wParam) {
          case VK_F1: index = 0; break;
          case VK_F2: index = 1; break;
          case VK_F3: index = 2; break;
          case VK_F4: index = 3; break;
          case VK_F5: index = 4; break;
          case VK_F6: index = 5; break;
          case VK_F7: index = 6; break;
          case VK_F8: index = 7; break;
          case VK_F9: index = 8; break;
          case VK_F10: index = 9; break;
          case VK_F11: index = 10; break;
          case VK_F12: index = 11; break;
        }
        if (keystate[VK_SHIFT] & 0x80) index += 12;
        if (keystate[VK_CONTROL] & 0x80) index += 24;
        p += sprintf((char *) p, "\x1B[%c", codes[index]);
        return p - output;
    }
    if (cfg.funky_type == FUNKY_SCO &&     /* SCO small keypad */
        code >= 1 && code <= 6) {
        char codes[] = "HL.FIG";
        if (code == 3) {
        *p++ = '\x7F';
        } else {
        p += sprintf((char *) p, "\x1B[%c", codes[code-1]);
        }
        return p - output;
    }
    if ((term->vt52_mode || cfg.funky_type == FUNKY_VT100P) && code >= 11 && code <= 24) {
        int offt = 0;
        if (code > 15)
        offt++;
        if (code > 21)
        offt++;
        if (term->vt52_mode)
        p += sprintf((char *) p, "\x1B%c", code + 'P' - 11 - offt);
        else
        p +=
            sprintf((char *) p, "\x1BO%c", code + 'P' - 11 - offt);
        return p - output;
    }
    if (cfg.funky_type == FUNKY_LINUX && code >= 11 && code <= 15) {
        p += sprintf((char *) p, "\x1B[[%c", code + 'A' - 11);
        return p - output;
    }
    if (cfg.funky_type == FUNKY_XTERM && code >= 11 && code <= 14) {
        if (term->vt52_mode)
        p += sprintf((char *) p, "\x1B%c", code + 'P' - 11);
        else
        p += sprintf((char *) p, "\x1BO%c", code + 'P' - 11);
        return p - output;
    }
    if (cfg.rxvt_homeend && (code == 1 || code == 4)) {
        p += sprintf((char *) p, code == 1 ? "\x1B[H" : "\x1BOw");
        return p - output;
    }
    if (code) {
        p += sprintf((char *) p, "\x1B[%d~", code);
        return p - output;
    }

    /*
     * Now the remaining keys (arrows and Keypad 5. Keypad 5 for
     * some reason seems to send VK_CLEAR to Windows...).
     */
    {
        char xkey = 0;
        switch (wParam) {
          case VK_UP:
        xkey = 'A';
        break;
          case VK_DOWN:
        xkey = 'B';
        break;
          case VK_RIGHT:
        xkey = 'C';
        break;
          case VK_LEFT:
        xkey = 'D';
        break;
          case VK_CLEAR:
        xkey = 'G';
        break;
        }
        if (xkey) {
        p += format_arrow_key(p, term, xkey, shift_state);
        return p - output;
        }
    }

    /*
     * Finally, deal with Return ourselves. (Win95 seems to
     * foul it up when Alt is pressed, for some reason.)
     */
    if (wParam == VK_RETURN) {     /* Return */
        *p++ = 0x0D;
        *p++ = 0;
        return -2;
    }

    if (left_alt && wParam >= VK_NUMPAD0 && wParam <= VK_NUMPAD9)
        alt_sum = alt_sum * 10 + wParam - VK_NUMPAD0;
    else
        alt_sum = 0;
    }

    /* Okay we've done everything interesting; let windows deal with 
     * the boring stuff */
    {
    BOOL capsOn=0;

    /* helg: clear CAPS LOCK state if caps lock switches to cyrillic */
    if(cfg.xlat_capslockcyr && keystate[VK_CAPITAL] != 0) {
        capsOn= !left_alt;
        keystate[VK_CAPITAL] = 0;
    }

    /* XXX how do we know what the max size of the keys array should
     * be is? There's indication on MS' website of an Inquire/InquireEx
     * functioning returning a KBINFO structure which tells us. */
    if (osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT) {
        /* XXX 'keys' parameter is declared in MSDN documentation as
         * 'LPWORD lpChar'.
         * The experience of a French user indicates that on
         * Win98, WORD[] should be passed in, but on Win2K, it should
         * be BYTE[]. German WinXP and my Win2K with "US International"
         * driver corroborate this.
         * Experimentally I've conditionalised the behaviour on the
         * Win9x/NT split, but I suspect it's worse than that.
         * See wishlist item `win-dead-keys' for more horrible detail
         * and speculations. */
        BYTE keybs[3];
        int i;
        r = ToAsciiEx(wParam, scan, keystate, (LPWORD)keybs, 0, kbd_layout);
        for (i=0; i<3; i++) keys[i] = keybs[i];
    } else {
        r = ToAsciiEx(wParam, scan, keystate, keys, 0, kbd_layout);
    }
#ifdef SHOW_TOASCII_RESULT
    if (r == 1 && !key_down) {
        if (alt_sum) {
        if (in_utf(term) || ucsdata.dbcs_screenfont)
            debug((", (U+%04x)", alt_sum));
        else
            debug((", LCH(%d)", alt_sum));
        } else {
        debug((", ACH(%d)", keys[0]));
        }
    } else if (r > 0) {
        int r1;
        debug((", ASC("));
        for (r1 = 0; r1 < r; r1++) {
        debug(("%s%d", r1 ? "," : "", keys[r1]));
        }
        debug((")"));
    }
#endif
    if (r > 0) {
        WCHAR keybuf;

        /*
         * Interrupt an ongoing paste. I'm not sure this is
         * sensible, but for the moment it's preferable to
         * having to faff about buffering things.
         */
        term_nopaste(term);

        p = output;
        for (i = 0; i < r; i++) {
        unsigned char ch = (unsigned char) keys[i];

        if (compose_state == 2 && (ch & 0x80) == 0 && ch > ' ') {
            compose_char = ch;
            compose_state++;
            continue;
        }
        if (compose_state == 3 && (ch & 0x80) == 0 && ch > ' ') {
            int nc;
            compose_state = 0;

            if ((nc = check_compose(compose_char, ch)) == -1) {
            MessageBeep(MB_ICONHAND);
            return 0;
            }
            keybuf = nc;
            term_seen_key_event(term);
            if (ldisc)
            luni_send(ldisc, &keybuf, 1, 1);
            continue;
        }

        compose_state = 0;

        if (!key_down) {
            if (alt_sum) {
            if (in_utf(term) || ucsdata.dbcs_screenfont) {
                keybuf = alt_sum;
                term_seen_key_event(term);
                if (ldisc)
                luni_send(ldisc, &keybuf, 1, 1);
            } else {
                ch = (char) alt_sum;
                /*
                 * We need not bother about stdin
                 * backlogs here, because in GUI PuTTY
                 * we can't do anything about it
                 * anyway; there's no means of asking
                 * Windows to hold off on KEYDOWN
                 * messages. We _have_ to buffer
                 * everything we're sent.
                 */
                term_seen_key_event(term);
                if (ldisc)
                ldisc_send(ldisc, &ch, 1, 1);
            }
            alt_sum = 0;
            } else {
            term_seen_key_event(term);
            if (ldisc)
                lpage_send(ldisc, kbd_codepage, &ch, 1, 1);
            }
        } else {
            if(capsOn && ch < 0x80) {
            WCHAR cbuf[2];
            cbuf[0] = 27;
            cbuf[1] = xlat_uskbd2cyrllic(ch);
            term_seen_key_event(term);
            if (ldisc)
                luni_send(ldisc, cbuf+!left_alt, 1+!!left_alt, 1);
            } else {
            char cbuf[2];
            cbuf[0] = '\033';
            cbuf[1] = ch;
            term_seen_key_event(term);
            if (ldisc)
                lpage_send(ldisc, kbd_codepage,
                       cbuf+!left_alt, 1+!!left_alt, 1);
            }
        }
        show_mouseptr(0);
        }

        /* This is so the ALT-Numpad and dead keys work correctly. */
        keys[0] = 0;

        return p - output;
    }
    /* If we're definitly not building up an ALT-54321 then clear it */
    if (!left_alt)
        keys[0] = 0;
    /* If we will be using alt_sum fix the 256s */
    else if (keys[0] && (in_utf(term) || ucsdata.dbcs_screenfont))
        keys[0] = 10;
    }

    /*
     * ALT alone may or may not want to bring up the System menu.
     * If it's not meant to, we return 0 on presses or releases of
     * ALT, to show that we've swallowed the keystroke. Otherwise
     * we return -1, which means Windows will give the keystroke
     * its default handling (i.e. bring up the System menu).
     */
    if (wParam == VK_MENU && !cfg.alt_only)
    return 0;
#endif
    return -1;
}

void set_title(void *frontend, char *title)
{
    sfree(window_name);
    window_name = snewn(1 + strlen(title), char);
    strcpy(window_name, title);
    if (cfg.win_name_always || !IsIconic(hwnd))
    SetWindowText(hwnd, title);
}

void set_icon(void *frontend, char *title)
{
    sfree(icon_name);
    icon_name = snewn(1 + strlen(title), char);
    strcpy(icon_name, title);
    if (!cfg.win_name_always && IsIconic(hwnd))
    SetWindowText(hwnd, title);
}

void set_sbar(void *frontend, int total, int start, int page)
{
    SCROLLINFO si;

    if (is_full_screen() ? !cfg.scrollbar_in_fullscreen : !cfg.scrollbar)
    return;

    si.cbSize = sizeof(si);
    si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
    si.nMin = 0;
    si.nMax = total - 1;
    si.nPage = page;
    si.nPos = start;
    if (hwnd)
    SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
}

Context get_ctx(void *frontend)
{
    HDC hdc;
    if (hwnd) {
    hdc = GetDC(hwnd);
    if (hdc && pal)
        SelectPalette(hdc, pal, FALSE);
    return hdc;
    } else
    return NULL;
}

void free_ctx(Context ctx)
{
    SelectPalette(ctx, GetStockObject(DEFAULT_PALETTE), FALSE);
    ReleaseDC(hwnd, ctx);
}

static void real_palette_set(int n, int r, int g, int b)
{
    if (pal) {
    logpal->palPalEntry[n].peRed = r;
    logpal->palPalEntry[n].peGreen = g;
    logpal->palPalEntry[n].peBlue = b;
    logpal->palPalEntry[n].peFlags = PC_NOCOLLAPSE;
    colours[n] = PALETTERGB(r, g, b);
    SetPaletteEntries(pal, 0, NALLCOLOURS, logpal->palPalEntry);
    } else
    colours[n] = RGB(r, g, b);
}

void palette_set(void *frontend, int n, int r, int g, int b)
{
    if (n >= 16)
    n += 256 - 16;
    if (n > NALLCOLOURS)
    return;
    real_palette_set(n, r, g, b);
    if (pal) {
    HDC hdc = get_ctx(frontend);
    UnrealizeObject(pal);
    RealizePalette(hdc);
    free_ctx(hdc);
    } else {
    if (n == (ATTR_DEFBG>>ATTR_BGSHIFT))
        /* If Default Background changes, we need to ensure any
         * space between the text area and the window border is
         * redrawn. */
        InvalidateRect(hwnd, NULL, TRUE);
    }
}

void palette_reset(void *frontend)
{
    int i;

    /* And this */
    for (i = 0; i < NALLCOLOURS; i++) {
    if (pal) {
        logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
        logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
        logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
        logpal->palPalEntry[i].peFlags = 0;
        colours[i] = PALETTERGB(defpal[i].rgbtRed,
                    defpal[i].rgbtGreen,
                    defpal[i].rgbtBlue);
    } else
        colours[i] = RGB(defpal[i].rgbtRed,
                 defpal[i].rgbtGreen, defpal[i].rgbtBlue);
    }

    if (pal) {
    HDC hdc;
    SetPaletteEntries(pal, 0, NALLCOLOURS, logpal->palPalEntry);
    hdc = get_ctx(frontend);
    RealizePalette(hdc);
    free_ctx(hdc);
    } else {
    /* Default Background may have changed. Ensure any space between
     * text area and window border is redrawn. */
    InvalidateRect(hwnd, NULL, TRUE);
    }
}

void write_aclip(void *frontend, char *data, int len, int must_deselect)
{
    HGLOBAL clipdata;
    void *lock;

    clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
    if (!clipdata)
    return;
    lock = GlobalLock(clipdata);
    if (!lock)
    return;
    memcpy(lock, data, len);
    ((unsigned char *) lock)[len] = 0;
    GlobalUnlock(clipdata);

    if (!must_deselect)
    SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd)) {
    EmptyClipboard();
    SetClipboardData(CF_TEXT, clipdata);
    CloseClipboard();
    } else
    GlobalFree(clipdata);

    if (!must_deselect)
    SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

/*
 * Note: unlike write_aclip() this will not append a nul.
 */
void write_clip(void *frontend, wchar_t * data, int *attr, int len, int must_deselect)
{
#if 0
    HGLOBAL clipdata, clipdata2, clipdata3;
    int len2;
    void *lock, *lock2, *lock3;

    len2 = WideCharToMultiByte(CP_ACP, 0, data, len, 0, 0, NULL, NULL);

    clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE,
               len * sizeof(wchar_t));
    clipdata2 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len2);

    if (!clipdata || !clipdata2) {
    if (clipdata)
        GlobalFree(clipdata);
    if (clipdata2)
        GlobalFree(clipdata2);
    return;
    }
    if (!(lock = GlobalLock(clipdata)))
    return;
    if (!(lock2 = GlobalLock(clipdata2)))
    return;

    memcpy(lock, data, len * sizeof(wchar_t));
    WideCharToMultiByte(CP_ACP, 0, data, len, lock2, len2, NULL, NULL);

    if (cfg.rtf_paste) {
    wchar_t unitab[256];
    char *rtf = NULL;
    unsigned char *tdata = (unsigned char *)lock2;
    wchar_t *udata = (wchar_t *)lock;
    int rtflen = 0, uindex = 0, tindex = 0;
    int rtfsize = 0;
    int multilen, blen, alen, totallen, i;
    char before[16], after[4];
    int fgcolour,  lastfgcolour  = 0;
    int bgcolour,  lastbgcolour  = 0;
    int attrBold,  lastAttrBold  = 0;
    int attrUnder, lastAttrUnder = 0;
    int palette[NALLCOLOURS];
    int numcolours;

    get_unitab(CP_ACP, unitab, 0);

    rtfsize = 100 + strlen(cfg.font.name);
    rtf = snewn(rtfsize, char);
    rtflen = sprintf(rtf, "{\\rtf1\\ansi\\deff0{\\fonttbl\\f0\\fmodern %s;}\\f0\\fs%d",
             cfg.font.name, cfg.font.height*2);

    /*
     * Add colour palette
     * {\colortbl ;\red255\green0\blue0;\red0\green0\blue128;}
     */

    /*
     * First - Determine all colours in use
     *    o  Foregound and background colours share the same palette
     */
    if (attr) {
        memset(palette, 0, sizeof(palette));
        for (i = 0; i < (len-1); i++) {
        fgcolour = ((attr[i] & ATTR_FGMASK) >> ATTR_FGSHIFT);
        bgcolour = ((attr[i] & ATTR_BGMASK) >> ATTR_BGSHIFT);

        if (attr[i] & ATTR_REVERSE) {
            int tmpcolour = fgcolour;    /* Swap foreground and background */
            fgcolour = bgcolour;
            bgcolour = tmpcolour;
        }

        if (bold_mode == BOLD_COLOURS && (attr[i] & ATTR_BOLD)) {
            if (fgcolour  <   8)    /* ANSI colours */
            fgcolour +=   8;
            else if (fgcolour >= 256)    /* Default colours */
            fgcolour ++;
        }

        if (attr[i] & ATTR_BLINK) {
            if (bgcolour  <   8)    /* ANSI colours */
            bgcolour +=   8;
                else if (bgcolour >= 256)    /* Default colours */
            bgcolour ++;
        }

        palette[fgcolour]++;
        palette[bgcolour]++;
        }

        /*
         * Next - Create a reduced palette
         */
        numcolours = 0;
        for (i = 0; i < NALLCOLOURS; i++) {
        if (palette[i] != 0)
            palette[i]  = ++numcolours;
        }

        /*
         * Finally - Write the colour table
         */
        rtf = sresize(rtf, rtfsize + (numcolours * 25), char);
        strcat(rtf, "{\\colortbl ;");
        rtflen = strlen(rtf);

        for (i = 0; i < NALLCOLOURS; i++) {
        if (palette[i] != 0) {
            rtflen += sprintf(&rtf[rtflen], "\\red%d\\green%d\\blue%d;", defpal[i].rgbtRed, defpal[i].rgbtGreen, defpal[i].rgbtBlue);
        }
        }
        strcpy(&rtf[rtflen], "}");
        rtflen ++;
    }

    /*
     * We want to construct a piece of RTF that specifies the
     * same Unicode text. To do this we will read back in
     * parallel from the Unicode data in `udata' and the
     * non-Unicode data in `tdata'. For each character in
     * `tdata' which becomes the right thing in `udata' when
     * looked up in `unitab', we just copy straight over from
     * tdata. For each one that doesn't, we must WCToMB it
     * individually and produce a \u escape sequence.
     * 
     * It would probably be more robust to just bite the bullet
     * and WCToMB each individual Unicode character one by one,
     * then MBToWC each one back to see if it was an accurate
     * translation; but that strikes me as a horrifying number
     * of Windows API calls so I want to see if this faster way
     * will work. If it screws up badly we can always revert to
     * the simple and slow way.
     */
    while (tindex < len2 && uindex < len &&
           tdata[tindex] && udata[uindex]) {
        if (tindex + 1 < len2 &&
        tdata[tindex] == '\r' &&
        tdata[tindex+1] == '\n') {
        tindex++;
        uindex++;
            }

            /*
             * Set text attributes
             */
            if (attr) {
                if (rtfsize < rtflen + 64) {
            rtfsize = rtflen + 512;
            rtf = sresize(rtf, rtfsize, char);
                }

                /*
                 * Determine foreground and background colours
                 */
                fgcolour = ((attr[tindex] & ATTR_FGMASK) >> ATTR_FGSHIFT);
                bgcolour = ((attr[tindex] & ATTR_BGMASK) >> ATTR_BGSHIFT);

        if (attr[tindex] & ATTR_REVERSE) {
            int tmpcolour = fgcolour;        /* Swap foreground and background */
            fgcolour = bgcolour;
            bgcolour = tmpcolour;
        }

        if (bold_mode == BOLD_COLOURS && (attr[tindex] & ATTR_BOLD)) {
            if (fgcolour  <   8)        /* ANSI colours */
            fgcolour +=   8;
            else if (fgcolour >= 256)        /* Default colours */
            fgcolour ++;
                }

        if (attr[tindex] & ATTR_BLINK) {
            if (bgcolour  <   8)        /* ANSI colours */
            bgcolour +=   8;
            else if (bgcolour >= 256)        /* Default colours */
            bgcolour ++;
                }

                /*
                 * Collect other attributes
                 */
        if (bold_mode != BOLD_COLOURS)
            attrBold  = attr[tindex] & ATTR_BOLD;
        else
            attrBold  = 0;
                
        attrUnder = attr[tindex] & ATTR_UNDER;

                /*
                 * Reverse video
         *   o  If video isn't reversed, ignore colour attributes for default foregound
             *    or background.
         *   o  Special case where bolded text is displayed using the default foregound
         *      and background colours - force to bolded RTF.
                 */
        if (!(attr[tindex] & ATTR_REVERSE)) {
            if (bgcolour >= 256)        /* Default color */
            bgcolour  = -1;            /* No coloring */

            if (fgcolour >= 256) {        /* Default colour */
            if (bold_mode == BOLD_COLOURS && (fgcolour & 1) && bgcolour == -1)
                attrBold = ATTR_BOLD;   /* Emphasize text with bold attribute */

            fgcolour  = -1;            /* No coloring */
            }
        }

                /*
                 * Write RTF text attributes
                 */
        if (lastfgcolour != fgcolour) {
                    lastfgcolour  = fgcolour;
            rtflen       += sprintf(&rtf[rtflen], "\\cf%d ", (fgcolour >= 0) ? palette[fgcolour] : 0);
                }

                if (lastbgcolour != bgcolour) {
                    lastbgcolour  = bgcolour;
                    rtflen       += sprintf(&rtf[rtflen], "\\highlight%d ", (bgcolour >= 0) ? palette[bgcolour] : 0);
                }

        if (lastAttrBold != attrBold) {
            lastAttrBold  = attrBold;
            rtflen       += sprintf(&rtf[rtflen], "%s", attrBold ? "\\b " : "\\b0 ");
        }

                if (lastAttrUnder != attrUnder) {
                    lastAttrUnder  = attrUnder;
                    rtflen        += sprintf(&rtf[rtflen], "%s", attrUnder ? "\\ul " : "\\ulnone ");
                }
        }

        if (unitab[tdata[tindex]] == udata[uindex]) {
        multilen = 1;
        before[0] = '\0';
        after[0] = '\0';
        blen = alen = 0;
        } else {
        multilen = WideCharToMultiByte(CP_ACP, 0, unitab+uindex, 1,
                           NULL, 0, NULL, NULL);
        if (multilen != 1) {
            blen = sprintf(before, "{\\uc%d\\u%d", multilen,
                   udata[uindex]);
            alen = 1; strcpy(after, "}");
        } else {
            blen = sprintf(before, "\\u%d", udata[uindex]);
            alen = 0; after[0] = '\0';
        }
        }
        assert(tindex + multilen <= len2);
        totallen = blen + alen;
        for (i = 0; i < multilen; i++) {
        if (tdata[tindex+i] == '\\' ||
            tdata[tindex+i] == '{' ||
            tdata[tindex+i] == '}')
            totallen += 2;
        else if (tdata[tindex+i] == 0x0D || tdata[tindex+i] == 0x0A)
            totallen += 6;     /* \par\r\n */
        else if (tdata[tindex+i] > 0x7E || tdata[tindex+i] < 0x20)
            totallen += 4;
        else
            totallen++;
        }

        if (rtfsize < rtflen + totallen + 3) {
        rtfsize = rtflen + totallen + 512;
        rtf = sresize(rtf, rtfsize, char);
        }

        strcpy(rtf + rtflen, before); rtflen += blen;
        for (i = 0; i < multilen; i++) {
        if (tdata[tindex+i] == '\\' ||
            tdata[tindex+i] == '{' ||
            tdata[tindex+i] == '}') {
            rtf[rtflen++] = '\\';
            rtf[rtflen++] = tdata[tindex+i];
        } else if (tdata[tindex+i] == 0x0D || tdata[tindex+i] == 0x0A) {
            rtflen += sprintf(rtf+rtflen, "\\par\r\n");
        } else if (tdata[tindex+i] > 0x7E || tdata[tindex+i] < 0x20) {
            rtflen += sprintf(rtf+rtflen, "\\'%02x", tdata[tindex+i]);
        } else {
            rtf[rtflen++] = tdata[tindex+i];
        }
        }
        strcpy(rtf + rtflen, after); rtflen += alen;

        tindex += multilen;
        uindex++;
    }

        rtf[rtflen++] = '}';           /* Terminate RTF stream */
        rtf[rtflen++] = '\0';
        rtf[rtflen++] = '\0';

    clipdata3 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, rtflen);
    if (clipdata3 && (lock3 = GlobalLock(clipdata3)) != NULL) {
        memcpy(lock3, rtf, rtflen);
        GlobalUnlock(clipdata3);
    }
    sfree(rtf);
    } else
    clipdata3 = NULL;

    GlobalUnlock(clipdata);
    GlobalUnlock(clipdata2);

    if (!must_deselect)
    SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd)) {
    EmptyClipboard();
    SetClipboardData(CF_UNICODETEXT, clipdata);
    SetClipboardData(CF_TEXT, clipdata2);
    if (clipdata3)
        SetClipboardData(RegisterClipboardFormat(CF_RTF), clipdata3);
    CloseClipboard();
    } else {
    GlobalFree(clipdata);
    GlobalFree(clipdata2);
    }

    if (!must_deselect)
    SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
#endif
}

static DWORD WINAPI clipboard_read_threadfunc(void *param)
{
    HWND hwnd = (HWND)param;
    HGLOBAL clipdata;

    if (OpenClipboard(NULL)) {
    if ((clipdata = GetClipboardData(CF_UNICODETEXT))) {
        SendMessage(hwnd, WM_GOT_CLIPDATA, (WPARAM)1, (LPARAM)clipdata);
    } else if ((clipdata = GetClipboardData(CF_TEXT))) {
        SendMessage(hwnd, WM_GOT_CLIPDATA, (WPARAM)0, (LPARAM)clipdata);
    }
    CloseClipboard();
    }

    return 0;
}

static int process_clipdata(HGLOBAL clipdata, int unicode)
{
    sfree(clipboard_contents);
    clipboard_contents = NULL;
    clipboard_length = 0;

    if (unicode) {
    wchar_t *p = GlobalLock(clipdata);
    wchar_t *p2;

    if (p) {
        /* Unwilling to rely on Windows having wcslen() */
        for (p2 = p; *p2; p2++);
        clipboard_length = p2 - p;
        clipboard_contents = snewn(clipboard_length + 1, wchar_t);
        memcpy(clipboard_contents, p, clipboard_length * sizeof(wchar_t));
        clipboard_contents[clipboard_length] = L'\0';
        return TRUE;
    }
    } else {
    char *s = GlobalLock(clipdata);
    int i;

    if (s) {
        i = MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1, 0, 0);
        clipboard_contents = snewn(i, wchar_t);
        MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1,
                clipboard_contents, i);
        clipboard_length = i - 1;
        clipboard_contents[clipboard_length] = L'\0';
        return TRUE;
    }
    }

    return FALSE;
}

void request_paste(void *frontend)
{
    /*
     * I always thought pasting was synchronous in Windows; the
     * clipboard access functions certainly _look_ synchronous,
     * unlike the X ones. But in fact it seems that in some
     * situations the contents of the clipboard might not be
     * immediately available, and the clipboard-reading functions
     * may block. This leads to trouble if the application
     * delivering the clipboard data has to get hold of it by -
     * for example - talking over a network connection which is
     * forwarded through this very PuTTY.
     *
     * Hence, we spawn a subthread to read the clipboard, and do
     * our paste when it's finished. The thread will send a
     * message back to our main window when it terminates, and
     * that tells us it's OK to paste.
     */
    DWORD in_threadid; /* required for Win9x */
    CreateThread(NULL, 0, clipboard_read_threadfunc,
         hwnd, 0, &in_threadid);
}

void get_clip(void *frontend, wchar_t **p, int *len)
{
    if (p) {
    *p = clipboard_contents;
    *len = clipboard_length;
    }
}

#if 0
/*
 * Move `lines' lines from position `from' to position `to' in the
 * window.
 */
void optimised_move(void *frontend, int to, int from, int lines)
{
    RECT r;
    int min, max;

    min = (to < from ? to : from);
    max = to + from - min;

    r.left = offset_width;
    r.right = offset_width + term->cols * font_width;
    r.top = offset_height + min * font_height;
    r.bottom = offset_height + (max + lines) * font_height;
    ScrollWindow(hwnd, 0, (to - from) * font_height, &r, &r);
}
#endif

/*
 * Print a message box and perform a fatal exit.
 */
void fatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

/*
 * Print a modal (Really Bad) message box and perform a fatal exit.
 */
void modalfatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff,
           MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

DECL_WINDOWS_FUNCTION(static, BOOL, FlashWindowEx, (PFLASHWINFO));

static void init_flashwindow(void)
{
    HMODULE user32_module = load_system32_dll("user32.dll");
    GET_WINDOWS_FUNCTION(user32_module, FlashWindowEx);
}

static BOOL flash_window_ex(DWORD dwFlags, UINT uCount, DWORD dwTimeout)
{
    if (p_FlashWindowEx) {
    FLASHWINFO fi;
    fi.cbSize = sizeof(fi);
    fi.hwnd = hwnd;
    fi.dwFlags = dwFlags;
    fi.uCount = uCount;
    fi.dwTimeout = dwTimeout;
    return (*p_FlashWindowEx)(&fi);
    }
    else
    return FALSE; /* shrug */
}

static void flash_window(int mode);
static long next_flash;
static int flashing = 0;

/*
 * Timer for platforms where we must maintain window flashing manually
 * (e.g., Win95).
 */
static void flash_window_timer(void *ctx, long now)
{
    if (flashing && now - next_flash >= 0) {
    flash_window(1);
    }
}

/*
 * Manage window caption / taskbar flashing, if enabled.
 * 0 = stop, 1 = maintain, 2 = start
 */
static void flash_window(int mode)
{
    if ((mode == 0) || (cfg.beep_ind == B_IND_DISABLED)) {
    /* stop */
    if (flashing) {
        flashing = 0;
        if (p_FlashWindowEx)
        flash_window_ex(FLASHW_STOP, 0, 0);
        else
        FlashWindow(hwnd, FALSE);
    }

    } else if (mode == 2) {
    /* start */
    if (!flashing) {
        flashing = 1;
        if (p_FlashWindowEx) {
        /* For so-called "steady" mode, we use uCount=2, which
         * seems to be the traditional number of flashes used
         * by user notifications (e.g., by Explorer).
         * uCount=0 appears to enable continuous flashing, per
         * "flashing" mode, although I haven't seen this
         * documented. */
        flash_window_ex(FLASHW_ALL | FLASHW_TIMER,
                (cfg.beep_ind == B_IND_FLASH ? 0 : 2),
                0 /* system cursor blink rate */);
        /* No need to schedule timer */
        } else {
        FlashWindow(hwnd, TRUE);
        next_flash = schedule_timer(450, flash_window_timer, hwnd);
        }
    }

    } else if ((mode == 1) && (cfg.beep_ind == B_IND_FLASH)) {
    /* maintain */
    if (flashing && !p_FlashWindowEx) {
        FlashWindow(hwnd, TRUE);    /* toggle */
        next_flash = schedule_timer(450, flash_window_timer, hwnd);
    }
    }
}

/*
 * Beep.
 */
void do_beep(void *frontend, int mode)
{
    if (mode == BELL_DEFAULT) {
    /*
     * For MessageBeep style bells, we want to be careful of
     * timing, because they don't have the nice property of
     * PlaySound bells that each one cancels the previous
     * active one. So we limit the rate to one per 50ms or so.
     */
    static long lastbeep = 0;
    long beepdiff;

    beepdiff = GetTickCount() - lastbeep;
    if (beepdiff >= 0 && beepdiff < 50)
        return;
    MessageBeep(MB_OK);
    /*
     * The above MessageBeep call takes time, so we record the
     * time _after_ it finishes rather than before it starts.
     */
    lastbeep = GetTickCount();
    } else if (mode == BELL_WAVEFILE) {
    if (!PlaySound(cfg.bell_wavefile.path, NULL,
               SND_ASYNC | SND_FILENAME)) {
        char buf[sizeof(cfg.bell_wavefile.path) + 80];
        char otherbuf[100];
        sprintf(buf, "Unable to play sound file\n%s\n"
            "Using default sound instead", cfg.bell_wavefile.path);
        sprintf(otherbuf, "%.70s Sound Error", appname);
        MessageBox(hwnd, buf, otherbuf,
               MB_OK | MB_ICONEXCLAMATION);
        cfg.beep = BELL_DEFAULT;
    }
    } else if (mode == BELL_PCSPEAKER) {
    static long lastbeep = 0;
    long beepdiff;

    beepdiff = GetTickCount() - lastbeep;
    if (beepdiff >= 0 && beepdiff < 50)
        return;

    /*
     * We must beep in different ways depending on whether this
     * is a 95-series or NT-series OS.
     */
    if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT)
        Beep(800, 100);
    else
        MessageBeep(-1);
    lastbeep = GetTickCount();
    }
    /* Otherwise, either visual bell or disabled; do nothing here */
    if (!term->has_focus) {
    flash_window(2);           /* start */
    }
}

/*
 * Minimise or restore the window in response to a server-side
 * request.
 */
void set_iconic(void *frontend, int iconic)
{
    if (IsIconic(hwnd)) {
    if (!iconic)
        ShowWindow(hwnd, SW_RESTORE);
    } else {
    if (iconic)
        ShowWindow(hwnd, SW_MINIMIZE);
    }
}

/*
 * Move the window in response to a server-side request.
 */
void move_window(void *frontend, int x, int y)
{
    if (cfg.resize_action == RESIZE_DISABLED || 
        cfg.resize_action == RESIZE_FONT ||
    IsZoomed(hwnd))
       return;

    SetWindowPos(hwnd, NULL, x, y, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
}

/*
 * Move the window to the top or bottom of the z-order in response
 * to a server-side request.
 */
void set_zorder(void *frontend, int top)
{
    if (cfg.alwaysontop)
    return;                   /* ignore */
    SetWindowPos(hwnd, top ? HWND_TOP : HWND_BOTTOM, 0, 0, 0, 0,
         SWP_NOMOVE | SWP_NOSIZE);
}

/*
 * Refresh the window in response to a server-side request.
 */
void refresh_window(void *frontend)
{
    InvalidateRect(hwnd, NULL, TRUE);
}

/*
 * Maximise or restore the window in response to a server-side
 * request.
 */
void set_zoomed(void *frontend, int zoomed)
{
    if (IsZoomed(hwnd)) {
        if (!zoomed)
        ShowWindow(hwnd, SW_RESTORE);
    } else {
    if (zoomed)
        ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

/*
 * Report whether the window is iconic, for terminal reports.
 */
int is_iconic(void *frontend)
{
    return IsIconic(hwnd);
}

/*
 * Report the window's position, for terminal reports.
 */
void get_window_pos(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.left;
    *y = r.top;
}

/*
 * Report the window's pixel size, for terminal reports.
 */
void get_window_pixels(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.right - r.left;
    *y = r.bottom - r.top;
}

/*
 * Return the window or icon title.
 */
char *get_window_title(void *frontend, int icon)
{
    return icon ? icon_name : window_name;
}

/*
 * See if we're in full-screen mode.
 */
static int is_full_screen()
{
    if (!IsZoomed(hwnd))
    return FALSE;
    if (GetWindowLongPtr(hwnd, GWL_STYLE) & WS_CAPTION)
    return FALSE;
    return TRUE;
}

/* Get the rect/size of a full screen window using the nearest available
 * monitor in multimon systems; default to something sensible if only
 * one monitor is present. */
static int get_fullscreen_rect(RECT * ss)
{
#if defined(MONITOR_DEFAULTTONEAREST) && !defined(NO_MULTIMON)
    HMONITOR mon;
    MONITORINFO mi;
    mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
    mi.cbSize = sizeof(mi);
    GetMonitorInfo(mon, &mi);

    /* structure copy */
    *ss = mi.rcMonitor;
    return TRUE;
#else
/* could also use code like this:
    ss->left = ss->top = 0;
    ss->right = GetSystemMetrics(SM_CXSCREEN);
    ss->bottom = GetSystemMetrics(SM_CYSCREEN);
*/ 
    return GetClientRect(GetDesktopWindow(), ss);
#endif
}


/*
 * Go full-screen. This should only be called when we are already
 * maximised.
 */
static void make_full_screen()
{
    DWORD style;
    RECT ss;

    assert(IsZoomed(hwnd));

    if (is_full_screen())
        return;
    
    /* Remove the window furniture. */
    style = GetWindowLongPtr(hwnd, GWL_STYLE);
    style &= ~(WS_CAPTION | WS_BORDER | WS_THICKFRAME);
    if (cfg.scrollbar_in_fullscreen)
    style |= WS_VSCROLL;
    else
    style &= ~WS_VSCROLL;
    SetWindowLongPtr(hwnd, GWL_STYLE, style);

    /* Resize ourselves to exactly cover the nearest monitor. */
    get_fullscreen_rect(&ss);
    SetWindowPos(hwnd, HWND_TOP, ss.left, ss.top,
            ss.right - ss.left,
            ss.bottom - ss.top,
            SWP_FRAMECHANGED);

    /* We may have changed size as a result */

    reset_window(0);

    /* Tick the menu item in the System and context menus. */
    {
    int i;
    for (i = 0; i < lenof(popup_menus); i++)
        CheckMenuItem(popup_menus[i].menu, IDM_FULLSCREEN, MF_CHECKED);
    }
}

/*
 * Clear the full-screen attributes.
 */
static void clear_full_screen()
{
    DWORD oldstyle, style;

    /* Reinstate the window furniture. */
    style = oldstyle = GetWindowLongPtr(hwnd, GWL_STYLE);
    style |= WS_CAPTION | WS_BORDER;
    if (cfg.resize_action == RESIZE_DISABLED)
        style &= ~WS_THICKFRAME;
    else
        style |= WS_THICKFRAME;
    if (cfg.scrollbar)
    style |= WS_VSCROLL;
    else
    style &= ~WS_VSCROLL;
    if (style != oldstyle) {
    SetWindowLongPtr(hwnd, GWL_STYLE, style);
    SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
             SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
             SWP_FRAMECHANGED);
    }

    /* Untick the menu item in the System and context menus. */
    {
    int i;
    for (i = 0; i < lenof(popup_menus); i++)
        CheckMenuItem(popup_menus[i].menu, IDM_FULLSCREEN, MF_UNCHECKED);
    }
}

/*
 * Toggle full-screen mode.
 */
static void flip_full_screen()
{
    if (is_full_screen()) {
    ShowWindow(hwnd, SW_RESTORE);
    } else if (IsZoomed(hwnd)) {
    make_full_screen();
    } else {
    SendMessage(hwnd, WM_FULLSCR_ON_MAX, 0, 0);
    ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

void frontend_keypress(void *handle)
{
    /*
     * Keypress termination in non-Close-On-Exit mode is not
     * currently supported in PuTTY proper, because the window
     * always has a perfectly good Close button anyway. So we do
     * nothing here.
     */
    return;
}

int from_backend(void *frontend, int is_stderr, const char *data, int len)
{
    return term_data(term, is_stderr, data, len);
}

int from_backend_untrusted(void *frontend, const char *data, int len)
{
    return term_data_untrusted(term, data, len);
}

int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
{
    int ret;
    ret = cmdline_get_passwd_input(p, in, inlen);
    if (ret == -1)
    ret = term_get_userpass_input(term, p, in, inlen);
    return ret;
}

void agent_schedule_callback(void (*callback)(void *, void *, int),
                 void *callback_ctx, void *data, int len)
{
    struct agent_callback *c = snew(struct agent_callback);
    c->callback = callback;
    c->callback_ctx = callback_ctx;
    c->data = data;
    c->len = len;
    PostMessage(hwnd, WM_AGENT_CALLBACK, 0, (LPARAM)c);
}