Modified form of Jim Lucas's PC speaker patch. I don't like

discriminating on the Windows version in order to decide whether to
call MessageBeep(-1) or Beep() - I'd prefer to directly test the
specific OS property in any given case - but it looks as if this is
the best available option.

[originally from svn r3208]

putty.h

@@ -243,7 +243,7 @@ enum {
 
 enum {
     /* Bell settings (cfg.beep) */
-    BELL_DISABLED, BELL_DEFAULT, BELL_VISUAL, BELL_WAVEFILE
+    BELL_DISABLED, BELL_DEFAULT, BELL_VISUAL, BELL_WAVEFILE, BELL_PCSPEAKER
 };
 
 enum {

wincfg.c

@@ -103,10 +103,10 @@ void win_setup_config_box(struct controlbox *b, HWND *hwndp, int has_help,
 		  dlg_stdcheckbox_handler, I(offsetof(Config,ctrlaltkeys)));
 
     /*
-     * Windows allows an arbitrary .WAV to be played as a bell. For
-     * this we must search the existing controlset for the
-     * radio-button set controlling the `beep' option, and add an
-     * extra button to it.
+     * Windows allows an arbitrary .WAV to be played as a bell, and
+     * also the use of the PC speaker. For this we must search the
+     * existing controlset for the radio-button set controlling the
+     * `beep' option, and add extra buttons to it.
      * 
      * Note that although this _looks_ like a hideous hack, it's
      * actually all above board. The well-defined interface to the
@@ -127,18 +127,22 @@ void win_setup_config_box(struct controlbox *b, HWND *hwndp, int has_help,
 	    if (c->generic.type == CTRL_RADIO &&
 		c->generic.context.i == offsetof(Config, beep)) {
 		assert(c->generic.handler == dlg_stdradiobutton_handler);
-		c->radio.nbuttons++;
+		c->radio.nbuttons += 2;
 		c->radio.buttons =
 		    sresize(c->radio.buttons, c->radio.nbuttons, char *);
 		c->radio.buttons[c->radio.nbuttons-1] =
 		    dupstr("Play a custom sound file");
+		c->radio.buttons[c->radio.nbuttons-2] =
+		    dupstr("Beep using the PC speaker");
 		c->radio.buttondata =
 		    sresize(c->radio.buttondata, c->radio.nbuttons, intorptr);
 		c->radio.buttondata[c->radio.nbuttons-1] = I(BELL_WAVEFILE);
+		c->radio.buttondata[c->radio.nbuttons-2] = I(BELL_PCSPEAKER);
 		if (c->radio.shortcuts) {
 		    c->radio.shortcuts =
 			sresize(c->radio.shortcuts, c->radio.nbuttons, char);
 		    c->radio.shortcuts[c->radio.nbuttons-1] = NO_SHORTCUT;
+		    c->radio.shortcuts[c->radio.nbuttons-2] = NO_SHORTCUT;
 		}
 		break;
 	    }

window.c

@@ -4406,6 +4406,23 @@ void beep(void *frontend, int mode)
 		       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) {