The spin command starts spinning a disc or stops the disc from spinning. Videodisc devices recognize this command.
wsprintf(lpstrCommand, "spin %s %s %s", lpszDeviceID, lpszUpDown, 
    lpszFlags); 
 | down | Stops the disc from spinning. | 
| up | Starts spinning the disc. | 
Returns zero if successful or an error otherwise.
The following command starts spinning a videodisc device:
spin videodisc up
 
  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
MCI Overview, MCI Command Strings