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
Handle to the mixer device that sent the notification message.
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.
An application must open a mixer device and specify a callback window to receive the MM_MIXM_LINE_CHANGE message.
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.