1. What docs have you read?
2. What code have you written for the Perl ap with prints in it?
3. What's the GUI code look like?

And, prescriptively, read On asking for help, How do I post a question effectively? and I know what I mean. Why don't you? (and before posting answers to the second and third questions above, Markup in the Monastery.

Update: Borked the link re markup; fixed ( with thanks to marto. )