My driver is using VideoPortCreateSecondaryDisplay() to add 3
secondary displays (XP Sp2).

I'm finding that my VidGetVideoChildDescriptor() never gets called
with HwDevExtn for any of the secondary displays. Even if I invoke
VideoPortEnumerateChildren() with an argument HwDevExtn for one of the
secondary displays, by the time the call arrives in
VidGetVideoChildDescriptor() the HwDevExtn has been altered to that of
the the primary device.

Am I missing something here? I would like to be able to return
different EDID data for my secondary devices, but the above behaviour
means that this is not possible.

regards
Andrew.