Important Notice

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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

  ◄Syntax►  ◄Details►  ◄Example►                 ◄Contents►  ◄Index►  ◄Back►
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LOCK [#]filenumber% [,{record& |[start&] TO end&}]
    .
    .
    .
UNLOCK [#]filenumber% [,{record& | [start&] TO end&}]
 
    ■ filenumber%   The number with which the file was opened.
    ■ record&       The number of the record or byte to be locked.
    ■ start&        The number of the first record or byte to be locked.
    ■ end&          The number of the last record or byte to be locked.
 
See Also    ◄OPEN (File I/O)►