Will cause gtk to exit completely if it is the only window gtk_widget_destroy(GTK_WIDGET(MainWindow));  

  Maximize The Window gtk_window_maximize(GTK_WINDOW(MainWindow)); Resizable gtk_window_set_resizable(GTK_WINDOW(MainWindow), FALSE);   Hide the title bar etc gtk_window_set_decorated(GTK_WINDOW(MainWindow), false); //Request the window title bar to be hidden, use before gtk_widget_show() Set Fullscreen Fill entire screen, displaying over the top of the taskbar panel. gtk_widget_show(fixed); //Make the window fullscreen gtk_window_fullscreen(GTK_WINDOW(MainWindow));