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MM_MIXM_LINE_CHANGE (Compact 2013)

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3/26/2014

This 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.

Syntax

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

Parameters

  • hMixer
    Handle of the mixer device (HMIXER) that sent the 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.

Return Value

None.

Remarks

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

Requirements

Header

mmsystem.h

See Also

Reference

Hardware Audio Mixer Messages
mixerGetLineInfo
MIXERLINE