>I've been trying to find a way to do this, but the only thing that seems to act this way at all is the ToolTips. Not a way I can find to use that. Anyone done this or have any ideas?

I see Gary has given you a technique that sounds like it will work. Out of curiosity, do you want the popup form to receive focus or just hover off to the side somewhere? Receiving focus might not be that great from a UI perspective. A user who simply passes the mouse over a grid, accidentally or on purpose, might not want to be tossed into a new form. And s/he might get dizzy if the mouse passes over a range of grid cells, a whole series of forms opening and closing. Asteroids!