Hello, The documentation at http://docs.adacore.com/gtkada-docs/gtkada_ug/_build/html/glade.html still mentions Glade-3 (the gtk+ 2 based version, currently 3.8.5) but I have found that current GtkAda also works with the gtk+ 3 based Glade (tried out 3.18.3.) Hope this helps, Oliver