You should be using the _SCREEN object in VFP.

>I have used the following line:
>
>'modify window screen'
>
>so that I can maintain the vfp main window even if they change the monitor resolution. The above command works well in *.app but if compile to executed file the VFP 6.0 will generate error saying window not define.
>Is this a bug in VFP 6.0 ?