BCGSuite for MFC
void CBCGPGraphicsManager::SetDrawShadowMode ( BOOL  bSet,
const CBCGPColor color,
int  nTransparencyPercent,
int  nAngle,
int  nDistance 
)

Specifies the "shadow" rendering mode.

When this mode is on, all graphics manager objects will be rendered using semi-transparent brush with a specific offset.