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  FUNCTION IOResult : Word;
 
  Returns the status of the most recent I/O operation
 
  Unit:      System (used automatically)
 
  See also:  Append, BlockRead, BlockWrite, ChDir, Close, Eof, Eoln,
             Erase, Flush, GetDir, MkDir, Read, Readln, Rename, Reset,
             Rewrite, RmDir, Seek, SeekEof, SeekEoln, Truncate, Write,
             Writeln