Hi Ionut,
>
>I have a code like this one:
>
>_screen.hide
>do form form1
>
>
>now form1 is a formset containing 2 forms. At every Activate event of a form there is a GetFocus api. Somehow this function doesen't work. If i eliminate the _screen.hide it works. Why?
>
try it:

_screen.visible = .F.
do form form1
read events
return

procedure yourformset.form1.activate  && <-- use it on your form1.activate method to send the focus for the properly window (i used form2 as sample)
show window (thisformset.form2.name) top

HTH

Claudio