+
+ win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+ g_signal_connect(G_OBJECT(win), "destroy", G_CALLBACK(on_destroy), NULL);
+ g_signal_connect(G_OBJECT(win), "expose-event", G_CALLBACK(on_expose), NULL);
+ gtk_widget_set_app_paintable(win, TRUE);
+ gtk_widget_show_all(win);
+
+ gtk_main();