Difference between revisions of "LOCK (access)"

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*LOCK WRITE: When specified, write access is denied to other file procedures.
*LOCK WRITE: When specified, write access is denied to other file procedures.
*LOCK READ WRITE: When specified any access is denied to other file procedures.
*LOCK READ WRITE: When specified any access is denied to other file procedures.
''See also:'' [[ACCESS]]

Revision as of 00:11, 27 February 2010

A LOCK access READ or WRITE can be specified in a file OPEN statement in a network environment(DOS 3.1 or higher).


  • Default: When LOCK is not specified in an OPEN statement, all other processes are denied file access.
  • LOCK READ: When specified, read access is denied to other file procedures.
  • LOCK WRITE: When specified, write access is denied to other file procedures.
  • LOCK READ WRITE: When specified any access is denied to other file procedures.



See also: ACCESS