memset(&mPluginWindow, 0, sizeof(mPluginWindow));
nsCOMPtr<nsIPluginHost> ph = do_GetService(kCPluginManagerCID); nsCOMPtr<nsPIPluginHost> pph(do_QueryInterface(ph)); if (pph) pph->NewPluginNativeWindow(&mPluginWindow); else mPluginWindow = nsnull;
pluginInstanceOwner :: pluginInstanceOwner(){  NS_INIT_ISUPPORTS();  memset(&mPluginWindow, 0, sizeof(mPluginWindow));  mInstance = nsnull;  mWindow = nsnull;  mViewer = nsnull;  mWidgetVisible = PR_TRUE;}