WORD midiOutGetID(hMidiOut, lpwDeviceID)
This function gets the device ID for a MIDI output device.
HMIDIOUT hMidiOut
Specifies the handle to the MIDI output device.
LPWORD lpwDeviceID
Specifies a pointer to the WORD-sized memory location to be filled with the device ID.
Returns MMSYSERR_NOERROR if successful. Otherwise, returns an error number. Possible error returns are:
MMSYSERR_INVALHANDLE
The hMidiOut parameter specifies an invalid handle.