The following code illustrates how to stop an audio or video device during playback or recording, and receive notification upon completion.

   USHORT            usDeviceID;
   HWND              hwndMyWindow;
   MCI_GENERIC_PARMS mciGenericParms;        /* Info data structure
                                                for command            */

                    /* Assign hwndCallback the handle to the PM Window */
   mciGenericParms.hwndCallback = hwndMyWindow;

                                             /* Stop the device        */

   mciSendCommand( usDeviceID,               /* Device ID              */
    MCI_STOP,                                /* MCI stop message       */
    MCI_NOTIFY,                              /* Flag for this message  */
    (PVOID) &mciGenericParms,                /* Data structure         */
    0);                                      /* No user parm           */