X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/582c005495b54e9c107029b70a0ae9e8c892634c..260f3dec11d702a907fdaf5aaee143abb01d0eb2:/window.c

diff --git a/window.c b/window.c
index 4c4360c4..865ff805 100644
--- a/window.c
+++ b/window.c
@@ -1,6 +1,7 @@
 #include <windows.h>
 #include <imm.h>
 #include <commctrl.h>
+#include <mmsystem.h>
 #ifndef AUTO_WINSOCK
 #ifdef WINSOCK_TWO
 #include <winsock2.h>
@@ -2663,7 +2664,21 @@ void fatalbox(char *fmt, ...) {
  */
 void beep(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 now, beepdiff;
+
+	now = GetTickCount();
+	beepdiff = now - lastbeep;
+	if (beepdiff >= 0 && beepdiff < 50)
+	    return;
 	MessageBeep(MB_OK);
+	lastbeep = now;
     } else if (mode == BELL_WAVEFILE) {
 	if (!PlaySound(cfg.bell_wavefile, NULL, SND_ASYNC | SND_FILENAME)) {
 	    char buf[sizeof(cfg.bell_wavefile)+80];