On Mon, 18 Sep 2017, Sven Schreiber wrote: That's a very interesting idea, and I think it could probably be made to work in gretl. I last experimented with glade many years ago and didn't find it very useful for my own purposes, but for function packages I guess it would be worth exploring. (Roughly speaking, glade is a "GUI for designing GUIs" that can output a GUI specification in an XML form that GTK is able to implement "automatically", bypassing the requirement for explicitly coding the interface in C. My understanding is that it works more reliably for GTK 2 -- which we use in our Windows and Mac packages -- than for GTK 3, but maybe we can handle both variants.) Allin