quartz: Check whether the pin is connected in IVideoWindow::put_AutoShow().

dlls/quartz/tests/videorenderer.c

@@ -2393,6 +2393,9 @@ static void test_video_window(void)
     hr = IVideoWindow_get_AutoShow(window, &l);
     todo_wine ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_AutoShow(window, OAFALSE);
+    ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
+
     testfilter_init(&source);
     IFilterGraph2_AddFilter(graph, &source.filter.IBaseFilter_iface, NULL);
     IFilterGraph2_AddFilter(graph, filter, NULL);

dlls/quartz/tests/vmr7.c

@@ -2392,6 +2392,9 @@ static void test_video_window(void)
     hr = IVideoWindow_get_AutoShow(window, &l);
     todo_wine ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_AutoShow(window, OAFALSE);
+    ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
+
     testfilter_init(&source);
     IFilterGraph2_AddFilter(graph, &source.filter.IBaseFilter_iface, NULL);
     IFilterGraph2_AddFilter(graph, filter, NULL);

dlls/quartz/tests/vmr9.c

@@ -2618,6 +2618,9 @@ static void test_video_window(void)
     hr = IVideoWindow_get_AutoShow(window, &l);
     todo_wine ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_AutoShow(window, OAFALSE);
+    ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
+
     testfilter_init(&source);
     IFilterGraph2_AddFilter(graph, &source.filter.IBaseFilter_iface, NULL);
     IFilterGraph2_AddFilter(graph, filter, NULL);

dlls/quartz/window.c

@@ -273,11 +273,14 @@ HRESULT WINAPI BaseControlWindowImpl_get_WindowStyleEx(IVideoWindow *iface, LONG
 
 HRESULT WINAPI BaseControlWindowImpl_put_AutoShow(IVideoWindow *iface, LONG AutoShow)
 {
-    struct video_window *This = impl_from_IVideoWindow(iface);
+    struct video_window *window = impl_from_IVideoWindow(iface);
+
+    TRACE("window %p, AutoShow %ld.\n", window, AutoShow);
 
-    TRACE("window %p, AutoShow %ld.\n", This, AutoShow);
+    if (!window->pPin->peer)
+        return VFW_E_NOT_CONNECTED;
 
-    This->AutoShow = AutoShow;
+    window->AutoShow = AutoShow;
 
     return S_OK;
 }