The following example illustrates how an application can set up notification for every audio attribute change.
MCI_GENERIC_PARMS mixevent;
mixevent.hwndCallback = hwndMixer;
if (hMixer)
{
mciSendCommand(hMixer,
MCI_MIXNOTIFY, /* MCI mixer message */
MCI_WAIT | MCI_MIXNOTIFY_ON, /* Flags for this message */
(PVOID)&mixevent, /* Data structure */
0); /* No user parm */