Thank you. I shall look at this. The
website makes Tkx look like the best solution. But I had trouble trying to utilise the MainLoop to do what I wanted. The Tcl docs at www.tcl.tk were a bit opaque on the subject.
I think that the fusion of Tcl and Tk with Perl hold great promise for Perl programmers. I want to see many more Perl GUI programs. I don't understand why so many Perl programmers are anti-GUI. Why can't Perl be the best at everything, not just at command line scripts?