>Thanks Herman, I sent you one more code example to test to verify this for me. I am seeing those same results you mention in WinXP. I can pull the data from the registry (where the GUID is irrelant using SetupDiGetDeviceRegistryProperty()) but not using SetupDiEnumDeviceInterfaces() in WinXP - only for HID Devices.
>
>I REALLY was hoping that was not the case :0(
>

Tracy,

Yup, the results is the same.

Well, I think this will be really hard :-(
I read some more from Windows DDK, the GUID_DEVCLASS_xxx is not a DEVICE INTERFACE CLASS, but a DEVICE SETUP CLASS. I think you have to create your own device driver to expose the Device Interface (you must have a DDK for this). I never make a Driver to Interface, so that things is beyond my knowledge.

One more thing, maybe you can try to create device interface by using SetupDiCreateDeviceInfoList(). For more info search for that function at MSDN.

Just for my curiousity, are you really need SetupDiEnumDeviceInterfaces() to make it work?

Good luck!