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
wParam = (WPARAM) hMixer
lParam = (LPARAM) dwControlID
Handle of the mixer device (HMIXER
) that sent the notification message.
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
An application must open a mixer device and specify a callback window to
receive the MM_MIXM_CONTROL_CHANGE message.
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