bas7qck.hlp (Table of Contents; Topic list)
LOCK...UNLOCK Statement
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LOCK [#]filenumber% [,{record& |[start&] TO end&}]
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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)►