MM_MIXM_CONTROL_CHANGE

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 of 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 the dwControlID member of the MIXERCONTROL structure returned by the mixerGetLineControls function.

Remarks

An application must open a mixer device and specify a callback window to receive the MM_MIXM_CONTROL_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, mixerGetLineControls, MIXERCONTROL