Thanks. That article is exactly what I was looking for. Actually, though, for this particular application, I don't want a GUI. I'm creating a command-line utility to manipulate the X windows selection/clipboard. Tk was just the only thing I could see right off that let me do that.

Thanks for your help. :-)

bbfu
Seasons don't fear The Reaper.
Nor do the wind, the sun, and the rain.
We can be like they are.