FREWIND IEXP

 Function
  Rewind an open file specified by channel IEXP after flushing buffers
  and committing the file to disk.

 Syntax
  FREWIND chan

   chan  - An integer expression with the open channel to rewind
           (0 through 7).

 Remarks
  This statement should be used when you need to rewind a file channel
  after it has been created/opened with an FCREATE, FOPEN, or FAPPEND
  statement.  Rewinding a file channel will flush file buffers, commit the
  file to disk, and reposition the file pointer to the beginning of the
  file.  Useful when you need to start over processing a file that may have
  changed and don't want to close and re-open the file.

 Examples
  STRING s
  FAPPEND 1,"C:\PCB\MAIN\PPE.LOG",O_RW,S_DN
  FPUTLN 1,U_NAME()
  FREWIND 1
  WHILE (!FERR(1)) DO
   FGET 1,s
   PRINTLN s
  ENDWHILE
  FCLOSE 1