>>OK, I haven't answered a VFP question in a LONG time, so I'll risk being slammed here if I'm wrong....but doesn't that need to be SHOWDIALOG instead of SHOW? Just a wild guess.
>
>I found what is causing the problem (right after I posted my question). I had the line _screen.windowstate = 2 _after_ the above code. Once I moved it to the top of the MAIN.PRG the window started working Modal.

Right. You can't change a window between modal and modeless once it's displayed.

Tamar