MM_MIXM_LINE_CHANGE

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 of 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 the dwLineID member of the MIXERLINE structure returned by the mixerGetLineInfo function.

Remarks

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

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in mmsystem.h.

See Also

Audio Mixers Overview, Audio Mixer Messages, mixerGetLineInfo, MIXERLINE