IMcDisplayGetMaskingRange Method

Sub GetMaskingRange ( 
	<OutAttribute> ByRef plRangeLow As Integer,
	<OutAttribute> ByRef plRangeHigh As Integer
)

When the viewer overlays the image with the masking image, mask pixel values outside of the range are ignored. If within the range, the mask pixel value is used as an index into the MaskingLUT lookup table, if it was assigned to. The resulting color is then overlaid onto the display image. The effect is that MaskingImage values outside of the masking range are transparent. For color MaskingImage types (McImageType.Interpretation mciRGB or mciBGR), all three color channels must fall outside of the masking range for the pixel to be transparent.