Audio/Video Tuning Wizard - What does it look for?

I am writing a wdm video capture driver.

It works with the Webcam part of MSN Messenger, but not
with the Video conference part.

When choosing my driver as the Camera source in the
Audio/Video Tuning Wizard Messenger says that there is
something wrong with the camera.

Messenger MVP Jonathan Kay writes in this message
http://www.mcse.ms/message346466.html that the
Audio/Video Tuning Wizard looks for the "Video
Conferencing" feature of the driver.

What exactly is this "Video Conferencing" feature?

( What is it that the A/V Tuning Wizard is looking for,
and where does it look?)

What do I need to add to the driver for Messenger to
recognize this feature and be able to use the driver as
the camera source in Video conferencing?

I cant seem to find any info about this in the Drivers
development kit.

Hopefully someone here has the answer to this.

Thanks,

Johan

To Jonathan Kay,

I saw you posted replies to other posts posted after
mine, which leads me to believe that you dont know the
answer to the question of what the "Video Conference"
feature is. Is this correct?

Also, do you know for sure that there actually *is*
something called the "Video Conference" feature or where
did you get that info from?

Since you are the Messenger MVP, do you have the contact
address to a Messenger engineer which can answer
questions about what the Audio/Video Tuning Wizard is
checking for?

Thanks,

Johan