>Maybe NT just doesn't Like you Bruce. :-) Probably something to do with your employer. :-) Jim's code seems to work pretty well for me here, and we only have NT machines.

You have no ghost at all in NT on grid columns with that code? It's quite noticeable if you have it, it's sort of like an ugly, partial mouse trail. I only have the one NT machine to test on, it could be guilty of a problem, I guess. I have exactly the same trouble with George's API code that he posted...

It *appears* to have the correct mouse driver, maybe I should experiment, though...