As [http://developer.gnome.org/gtk3/3.5/GtkHBox.html#GtkHBox.description its documentation says], Gtk.VBox and Gtk.HBox have been deprecated. So, we should use Gtk.Box instead them. Replacing: | As [http://developer.gnome.org/gtk3/3.5/GtkHBox.html#GtkHBox.description its documentation says], Gtk.VBox and Gtk.HBox have been deprecated. So, we should use Gtk.Box instead them. Replacing: |