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MOM_OPEN message (Mmsystem.h)

The MOM\_OPEN message is sent to a MIDI output callback function when a MIDI output device is opened.

f3360482-7d16-419c-b5d1-0dd3a6e3c690

MOM_OPEN message Windows Multimedia

apiref

MOM_OPEN

Mmsystem.h

HeaderDef

reference

05/31/2018

MOM_OPEN message

The MOM_OPEN message is sent to a MIDI output callback function when a MIDI output device is opened.

MOM_OPEN 
dwParam1 = reserved 
dwParam2 = reserved

Parameters

This message does not return a value.

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Mmsystem.h (include Windows.h)