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WOM_OPEN message (Mmsystem.h)

The WOM\_OPEN message is sent to a waveform-audio output callback function when a waveform-audio output device is opened.

7fa175d3-7c07-4ca0-a0bd-4526fbc24f8d

WOM_OPEN message Windows Multimedia

apiref

WOM_OPEN

Mmsystem.h

HeaderDef

reference

05/31/2018

WOM_OPEN message

The WOM_OPEN message is sent to a waveform-audio output callback function when a waveform-audio output device is opened.

WOM_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)