MODM_PAUSE

Sent to a MIDI output device driver to temporarily pause output. Playback of streams stops but no buffers are marked as done.

Returns zero if the operation is successful. Otherwise, it returns an error number. Possible error values include the following:

MMSYSERR_NOTENABLED

The driver failed to load or initialize.

The driver should halt MIDI playback in the current position. The driver should issue note-off messages all notes that are currently on.