Check your settings under Tools/Options/Form/Design Area

>>In my current app, all of forms are based on a simple class I wrote using an 800x600 area and are set to be maximized.
>>
>>On machines that have 1024x768 MOST of the forms display their background on the entire 1024x768 area (which is desireable) but some only display the background in 800x600. All of the form settings appear to be identical:
>>
>>MAXIMIZED Window State
>>No Sizebox
>>No Scroll Bars
>>No Title Bar
>>FIXED Boarder Style
>>Same .BMP background
>>
>>Ideas??
>
>Did you try assigning the background picture in the init event as the form loads?
>
>Robert