gtk_box_pack_end(vbox, glk, TRUE, TRUE, 0);
gtk_box_pack_start(vbox, menubar, FALSE, FALSE, 0);
gtk_box_pack_start(vbox, toolbar, FALSE, FALSE, 0);
gtk_box_pack_end(vbox, glk, TRUE, TRUE, 0);
gtk_box_pack_start(vbox, menubar, FALSE, FALSE, 0);
gtk_box_pack_start(vbox, toolbar, FALSE, FALSE, 0);