Try to add DOEVENTS to your code.

>I have a form that scans thru a large table. Thisform.Draw works great as long as the screen is left alone. But if I open another window in front of it and switch back to VFP application I get the white bar over the menu bar and image of the 2nd screen is left over the VFP app. I have tried _screen.draw and thisform.draw neither helps. How can I resolve this?