>I created a Top-Level applicaton using application builder. This provides a Windows MDI interface with more flexibility than _SCREEN because you can subclass it. I am unable to change the background color of the _topform.
>
>Any ideas

Probably the ColorSource property is not set to zero. However, I thought one of the reasons for using Top Level Forms and setting the ColorSource property of forms to 4 or 5 was to respect the users selection of colors via the Control Panel.