http://www.perlmonks.org?node_id=658662


in reply to Re^2: A dynamic Main Window in GTK2
in thread A dynamic Main Window in GTK2

I think your problem is that when you create the Label in the callback you do Gtk2::Label($active_interface); and that should be Gtk2::Label->new($active_interface); (of course, you still need to show_all on the main window)

HTH, --traveler