To Chris Moller and others interested, thanks for taking the time to respond, or if you're thinking of responding to my query, don't worry about responding because I have figured it out. Stupid me didn't realise that I would need a callback function for this also, Thanks, Roger Matthews _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list