[This is preliminary documentation and subject to change.]
The GetYValue macro retrieves the yellow color value from a CMYK color value.
BYTE GetYValue(
  cmyk  
);
 
  Windows NT: Requires version 4.0 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in wingdi.h.
Color Management Overview, Macros for CMYK Values and Colors, CMYK, GetCValue, GetMValue, GetKValue