Thank you, very much.
Not knowing any better, I started with the Tkx version of Tk. So, without rewriting your example, it's not going to run.
I guess I can install the Tk package (new to that also, don't know if installing Tk will break Tkx (and what I've scruffed together so far--2 weeks of learning :) )).
I would upload the working program, but it's now at about 1500 lines... so should I zip the program up and post it? It's probably not what an experienced Perl programmer would create.
I have started reading 'Network Programming with Perl, Lincoln Stein'. Perhaps that will enable me to resolve my obtuseness.
So anyway, thanks for the response.... will installing Tk break Tkx?