CompuServe Messages

It's not so much that I don't like it, I'm just not sure how much code should go into a function that gets called everytime the mouse is moved. I think it might be ok, because if the system is busy, then the messages would just pile up, and be processed when the system was free again. And when the system is free, who cares how much background work is being done ( to a point ). Is this true? Would it be considered a kludgy way of doing it if I stuck to the PtInRect way of doing it? P.S. I should have looked through the MSDNCD, but didn't. Thanks for looking it up and forwarding it to me. \Thx->CraigL Labatt Breweries of Canada