I modified snapshot sample and change the color space to CMYK, when I snapshot a CMYK image, the result is not the same as the original picture. It seems the black color is not deep enough. I guess snapshot utility gets image information from bitmap in memory, so the color information is in RGB color space. If it is save as a CMYK picture, there will be a convertion, this lead to the distortion. Is that right? Or, there is a method to snapshot a CMYK image without distortion.