void CBCGPImage::MakeDark	(	double	dblLum,
		BOOL	bUseModifyBitmapLuminosity = FALSE
	)

Makes the image dark.

Parameters

dblLum	The luminescence ratio.
bUseModifyBitmapLuminosity	Specifies whether the bitmap luminosity changing algorithm will be used instead of the blending algorithm. By default, this parameter is FALSE.