sapi: Implement ISpMMSysAudio::EventHandle.

dlls/sapi/mmaudio.c

@@ -728,9 +728,11 @@ static HRESULT WINAPI mmsysaudio_GetDefaultFormat(ISpMMSysAudio *iface, GUID *gu
 
 static HANDLE WINAPI mmsysaudio_EventHandle(ISpMMSysAudio *iface)
 {
-    FIXME("(%p): stub.\n", iface);
+    struct mmaudio *This = impl_from_ISpMMSysAudio(iface);
 
-    return NULL;
+    TRACE("(%p).\n", iface);
+
+    return This->event;
 }
 
 static HRESULT WINAPI mmsysaudio_GetVolumeLevel(ISpMMSysAudio *iface, ULONG *level)

dlls/sapi/tests/mmaudio.c

@@ -167,6 +167,8 @@ static void test_audio_out(void)
     UINT devid;
     char *buf = NULL;
     ULONG written;
+    DWORD start, end;
+    HANDLE event = NULL;
     HRESULT hr;
 
     if (waveOutGetNumDevs() == 0) {
@@ -258,6 +260,20 @@ static void test_audio_out(void)
     ok(hr == S_OK, "got %#lx.\n", hr);
     ok(written == wfx->nAvgBytesPerSec * 200 / 1000, "got %lu.\n", written);
 
+    hr = ISpMMSysAudio_Write(mmaudio, buf, wfx->nAvgBytesPerSec * 200 / 1000, NULL);
+    ok(hr == S_OK, "got %#lx.\n", hr);
+
+    start = GetTickCount();
+
+    event = ISpMMSysAudio_EventHandle(mmaudio);
+    ok(event != NULL, "event == NULL.\n");
+
+    hr = WaitForSingleObject(event, 1000);
+    ok(hr == WAIT_OBJECT_0, "got %#lx.\n", hr);
+
+    end = GetTickCount();
+    ok(end - start <= 500, "waited for %lu ms.\n", end - start);
+
     hr = ISpMMSysAudio_SetState(mmaudio, SPAS_CLOSED, 0);
     ok(hr == S_OK, "got %#lx.\n", hr);