Balloon Sound Fix 1.0.0 (#1269)

* Balloon Sound Fix 1.0.0

* Refactor hook to not be reliant on struct layouts

* Update README

mods/balloon-sound-fix.wh.cpp

@@ -0,0 +1,74 @@
+// ==WindhawkMod==
+// @id              balloon-sound-fix
+// @name            Balloon Sound Fix
+// @description     Makes notifciation balloons play a sound again
+// @version         1.0.0
+// @author          aubymori
+// @github          https://github.com/aubymori
+// @include         explorer.exe
+// @architecture    x86-64
+// @compilerOptions -lwinmm
+// ==/WindhawkMod==
+
+// ==WindhawkModReadme==
+/*
+# Balloon Sound Fix
+Windows XP played a sound when showing balloon notifications. However, this
+functionality has been broken since Windows Vista. This mod fixes that issue in
+Windows 10. This mod will *not* work on Windows 11's new taskbar, as that does
+not support legacy balloons.
+
+To enable the balloons, create the registry value
+`HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Windows\Explorer\EnableLegacyBalloonNotifications`
+as a DWORD, set it to 1, and restart Explorer (or sign out and sign in). 
+*/
+// ==/WindhawkModReadme==
+
+#include <windhawk_utils.h>
+
+HRESULT (*SHPlaySound_orig)(void);
+HRESULT SHPlaySound_hook(void)
+{
+    // Microsoft messed this up badly, presumably starting in Vista.
+    // It attempts to play the balloon sound from the `Explorer` app, when it
+    // should play it from `.Default`. The strange thing is, the original version
+    // of this function seems to include code for grabbing the .Default version
+    // of the sound from registry, but the result is never used.
+    WCHAR szFileName[MAX_PATH] = { 0 };
+    LONG cbSize = sizeof(szFileName);
+
+    if (ERROR_SUCCESS == RegQueryValueW(
+        HKEY_CURRENT_USER, L"AppEvents\\Schemes\\Apps\\.Default\\SystemNotification\\.Current", 
+        szFileName, &cbSize)
+        && szFileName[0])
+    {
+        PlaySoundW(szFileName, NULL, SND_FILENAME | SND_ASYNC | SND_NODEFAULT | SND_NOSTOP);
+    }
+    return S_OK;
+}
+
+const WindhawkUtils::SYMBOL_HOOK explorerExeHooks[] = {
+    {
+        {
+            L"SHPlaySound"
+        },
+        &SHPlaySound_orig,
+        SHPlaySound_hook,
+        false
+    }
+};
+
+BOOL Wh_ModInit(void)
+{
+    if (!WindhawkUtils::HookSymbols(
+        GetModuleHandleW(NULL),
+        explorerExeHooks,
+        ARRAYSIZE(explorerExeHooks)
+    ))
+    {
+        Wh_Log(L"Failed to hook SHPlaySound");
+        return FALSE;
+    }
+
+    return TRUE;
+}