Try doing Dumper(@_) before you do anything else in your routine. See exactly what is being passed. Then, you can figure out what you need to do to get to your hash.

I don't remember the Tk details off the top of my head, and I'm too lazy to go look them up before posting...

Are you using Games::Cards? Among other things, you will find Tk implementations of Klondike and Freecell that may have stealable^Wreusable code fragments.

yours,
Michael