>Hello,
>
>I have an EXE that shows some controls with different background color on 2 machines. The controls are command buttons and check boxes. Other controls don't show different background colors.
>
>Themes is .F..
>The controls Background and Disabled Background are set manually in the property sheet.
>
>I don't understand why the controls show different background colors.

Not knowing the actual reason, I'd look at

1) themes setting at various levels - the button itself, its parent containers (page, container, form, what have you)

2) colorsource property, which is by default = 4, Windows colors. Which works fine for most, meaning that your buttons have the colors of any other buttons on the same machine. These two machines may be simply using different colors, i.e. these two users didn't like the Windows defaults, good people :).