setCMYKOutputProfile

Set the CMYK output profile for one document.
setCMYKOutputProfile([in] BSTR profilePath)
Sets the CMYK output profile (for color management) for a single PDF file. This overrides the global xpdfrc setting.

Color management must be enabled (either via the global xpdfrc setting, or using enableColorManagement) before calling this function.

VB:
pdf.setCMYKOutputProfile("c:/profiles/some-profile.icc")
enableColorManagement
setGrayOutputProfile
setRGBOutputProfile