Where is MS SCSI-USB Bridge sample.

Dear all,
It looks like that there is a microsoft provided
SCSI-USB bridge
port driver sample.But I can not find it, anyone can
tell me where
is it or mail me one (xxxxx@yahoo.com).
Another question:
How SCSI miniport (or port) driver know existing of
USB WDM driver
and get device object pointer of it and call it?
Thanks.
BR
Volition2k.

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