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

dlls/quartz/tests/videorenderer.c

@@ -2402,6 +2402,9 @@ static void test_video_window(void)
     hr = IVideoWindow_put_MessageDrain(window, (OAHWND)our_hwnd);
     ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_Visible(window, OATRUE);
+    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

@@ -2401,6 +2401,9 @@ static void test_video_window(void)
     hr = IVideoWindow_put_MessageDrain(window, (OAHWND)our_hwnd);
     ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_Visible(window, OATRUE);
+    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

@@ -2627,6 +2627,9 @@ static void test_video_window(void)
     hr = IVideoWindow_put_MessageDrain(window, (OAHWND)our_hwnd);
     ok(hr == VFW_E_NOT_CONNECTED, "Got hr %#lx.\n", hr);
 
+    hr = IVideoWindow_put_Visible(window, OATRUE);
+    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

@@ -350,6 +350,9 @@ HRESULT WINAPI BaseControlWindowImpl_put_Visible(IVideoWindow *iface, LONG visib
 
     TRACE("window %p, visible %ld.\n", window, visible);
 
+    if (!window->pPin->peer)
+        return VFW_E_NOT_CONNECTED;
+
     ShowWindow(window->hwnd, visible ? SW_SHOW : SW_HIDE);
     return S_OK;
 }