Fida,
You can also treat the main VFP screen as a form by adding objects to it:
_SCREEN.AddObject('CommandButton'), etc... I have also had good results by creating a container class with all the controls I want, then adding that to the main screen, and resizing the main screen to match the container. User's can't tell the difference against other applications.
HTH
Mark

>I would like to know if anyone can help with this question:
>How do I :
>" Replace the Visual FoxPro Desktop with an App's Form "