Where can I find information on how to write an OpenGL ICD for my
(win2k/winxp) display driver?

In particular, I need information on OpenGL and multiple displays. I have a
driver and ICD works fine with only one card in the system As soon as I put
a second (identical) card in the system, I get no OpenGL acceleration on the
secondary display.

The MDSN documentation doesn't seem to include information on how to write
an ICD. Or at least I can't find it.

Thanks,
Noel.