Sweet. How coincidental - I was pondering exactly this the other day. I've been rewritting the old windows video-game Gazillionaire (http://www.lavamind.com/gaz.html) in Perl/Tk for my own amusement recently and I was thinking about how to do a fullscreen mode using just Tk. Between this and your other node on removing decorations, this is perfect!
in reply to Center a Tk window on the screen