Hi Mohammed
I don't know if this is the answer you are looking for, but just in case here it goes.

For the _SCREEN object I use

WITH _SCREEN
.Width=SYSMETRIC(1)
.Height=SYSMETRIC(2)
ENDWITH

and with the forms I don't do anything, I leave them as they were. The only thing is to use some object that can resize the forms and its controls when the use clicks the maximize button.
VFP has one of this.
Regards
Hernan