>>Sorry, don't have an answer for that. Although I would guess it has to do with the way VFP paints forms in the VFP screen.
>
>Roi,
>It has nothing to do with VFP. The WS_EX_LAYERED attribute needs to be set on the window for this function to work. Only top-level forms and forms with the Desktop property set to .T. are capable of having this.

No! It has to do with VFP. This attribute can be set to every window, including controls. I have it tested.

Alexander