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MM_MIXM_CONTROL_CHANGE message

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The MM_MIXM_CONTROL_CHANGE message is sent by a mixer device to notify an application that the state of a control associated with an audio line has changed. The application should refresh its display and cached values for the specified control.

MM_MIXM_CONTROL_CHANGE 
wParam = (WPARAM) hMixer 
lParam = (LPARAM) dwControlID

Parameters

hMixer

Handle to the mixer device (HMIXER) that sent the notification message.

dwControlID

Control identifier for the mixer control that has changed state. This identifier is the same as thedwControlID member of theMIXERCONTROLstructure returned by themixerGetLineControlsfunction.

Remarks

An application must open a mixer device and specify a callback window to receive the MM_MIXM_CONTROL_CHANGE message.

Requirements

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)

See also

Audio Mixers

Audio Mixer Messages