MODM_CLOSE

See also MODM_OPEN

Sent to a MIDI output device driver to deallocate a specified device.

MMSYSERR_NOTENABLED

The driver failed to load or initialize.

MIDIERR_STILLPLAYING

There are still buffers in the queue.


DWORD dwParam1

Unused.

DWORD dwParam2

Unused.

If there are output buffers that have been received with the MODM_LONGDATA message and haven't been returned to the application, the driver should fail the close operation by returning a MIDIERR_STILLPLAYING error. If the close operation is successful, the driver should use the DriverCallback function to send the client a MOM_CLOSE message.