#if (GTK_CHECK_VERSION(3,8,0) == 0)
#define gtk_widget_register_window(widget, window) gdk_window_set_user_data (window, widget);
#endif
#if (GTK_CHECK_VERSION(3,8,0) == 0)
#define gtk_widget_register_window(widget, window) gdk_window_set_user_data (window, widget);
#endif