MM_MIXM_LINE_CHANGE message

  • Article

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

MM_MIXM_LINE_CHANGE 
wParam = (WPARAM) hMixer 
lParam = (LPARAM) dwLineID

Parameters

hMixer

Handle to the mixer device that sent the notification message.

dwLineID

Line identifier for the audio line that has changed state. This identifier is the same as thedwLineID member of theMIXERLINEstructure returned by themixerGetLineInfofunction.

Remarks

An application must open a mixer device and specify a callback window to receive the MM_MIXM_LINE_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