Hello list! I'm a newbie, so I have a newbies question: I need to send a VERB down to the HD audio hardware to perform jack sense for a diagnostic. The only driver I'm guaranteed to have is hdaudbus.sys, which should be sufficient. I see that I need to query for an HDAUDIO_BUS_INTERFACE_V2 interface, but I don't see any examples in the DDK on how to go about doing this. Can someone kindly point me in the direction of some code snippets and/or documentation on how to go about doing this? The mechanism I'm currently using (Setup API to get device class, then trying to enumerate interfaces) fails horribly. All info appreciated. ..ed..