Unlock

Removes a previous access restriction (lock) on a file

Syntax
   Unlock #filenum, record
   Unlock #filenum, start To end

Parameters
   filenum
      The file number used to Open the file.
   record
      The record (Random files) to unlock.
   start
      The first byte position (Binary files) in a range to unlock.
   end
      The last byte position (Binary files) in a range to unlock.

Description
   Unlock removes the temporary access restriction set by Lock.

   It is strongly recommended to use the same arguments used in the 
   previous Lock.

   Note: This command does not always work, neither as documented nor as 
   expected. It appears to be broken at the moment.

Example
       For an example see Lock.

Differences from QB
   * Currently, FB cannot implicitly unlock the entire file
   * In Random mode, FB cannot unlock a range of records

See also
   * Lock
   * Open
   * ScreenUnlock

