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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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IOCTL Statement Programming Example
 
See the ◄IOCTL$ function programming example►, which shows how both the
IOCTL statement and IOCTL$ function are used with a device driver.
 
  Note: Any use of the IOCTL statement is device-driver dependent.
        The IOCTL statement uses string arguments that are only
        documented in the driver manual.