Actually, AlphaBlend is found, but a call to this function returns false. if( AlphaBlend && !AlphaBlend( m_hDC, xDest, yDest, width, height, hDC, 0, 0, width, height, bf ) ) { msg_Err( getIntf(), "AlphaBlend() failed" ); } MSDN (http://msdn.microsoft.com/fr-fr/library/dd183351%28en...