The PKEY_Device_DeviceDesc property contains the device description of the endpoint device (for example, "Speakers").
The vt member of the PROPVARIANT structure is set to VT_LPWSTR.
The pwszVal member of the PROPVARIANT structure points to a null-terminated, wide-character string that contains the device description.
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2008 [desktop apps only]