HRESULT DeviceNumSet(DWORD dwDeviceID);
Sets a new device identifier for the multimedia device that is the source of the audio stream.
· Returns NOERROR if successful, or one of these error values:
E_FAIL
AUDERR_BADDEVICEID
AUDERR_SYNCNOTALLOWED
AUDERR_WAVEDEVICEBUSY
AUDERR_WAVEDEVNOTSUPPORTED
dwDeviceID
[in] New device identifier.