Mirror Driver: Drop shadow of Icon label

> After loading the mirror driver, the background of the labels of
Desktop icon becomes opaque(blue). All the shortcuts lose the “Drop
shadow” effect.

You need to advertise shading and blending capabilities. In your
GDIINFO, set flShadeBlend to 3 (which is SB_CONST_ALPHA +
SB_PIXEL_ALPHA).

Oddly http://msdn2.microsoft.com/en-us/library/ms798469.aspx says
“Display drivers should ignore this member and should leave it set to
zero.” Anyone know why?

Hope this helps!

Tim Green
Development Engineer
DisplayLink (UK) Limited
Registered in England No. 04811048