>This is an example.
>
>The new.bmp from the Visual Studio bitmap collection shows a white page with the corner turned down. Just what I wanted.
>
>When I put this bmp on a button on a form, the page shows up grey, not white, without regard to whether the button is enabled or not.
>
>Can someone explain what is controlling the color (or colour) of the bmp?
>
>Many Thanks,

There's DisabledPicture property if you want picture to be different for disabled control. Also there's accompaing new.msk file that defines which areas of the bitmap are transparent. See Enhancing Control Display in help for details.