- gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (button1), TRUE, TRUE, 0);
- gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (button2), TRUE, TRUE, 0);
- gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (button3), TRUE, TRUE, 0);
- gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (vbox));
+ g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);