ColorChannelFlag
Specifies individual channels in the CMYK (cyan, magenta, yellow, black) color space. This enumeration is used by the SetOutputChannel methods.
ColorChannelC = 0
The cyan color channel.
ColorChannelK = 3
The black color channel.
ColorChannelLast = 4
The last selected channel should be used.
ColorChannelM = 1
The magenta color channel.
ColorChannelY = 2
The yellow color channel.