It would depends on how you placed the image on the desktop. If you use code from http://www.berezniker.com/content/pages/visual-foxpro/add-background-image-vfp-desktop and image file with transparent background than there's nothing additional to do.

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>I have placed an image on my applications desktop. How can I make parts of the image transparent so that the underlying desktop color shows through?
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>TIA