>>Remember (a long time ago...) in VFP 3.0 when we saw a flash until MAIN.PRG sent an instruction like "_Screen.Left=5000"? And when we wanted to use the main window again, we just had to say "_Screen.Left=0"?
>>Well, the situation is the same... Except that with the advent of SCREEN=OFF, I thought I could suppress that initial flashing...

Problem solved...

1. CONFIG.FPW-> SCREEN=OFF
2. frmLoginScr.ShowWindow = 2
3. frmLoginScr.UnLoad
.....Clear Events && b)
4. Main.PRG
.....Do Form frmLoginScr
.....Read Events && a)
....._Screen.WindowState=2
....._Screen.Visible=.T.
.....Do mnuMain.MPR
.....Read Events

I was missing the combination of a) and b). That's why it was all disapearing.

Thanks a lot!