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  Routine:      CBL_READ_FILE
 
  Function:     Reads bytes from a file.
 
  Syntax:       CALL "CBL_READ_FILE" USING      file-handle
                                                file-offset
                                                byte-count
                                                flags
                                                buffer
                                     RETURNING  status-code
 
  Parameters:   file-handle            PIC X(4).
                file-offset            PIC X(8) COMP-X.
                byte-count             PIC X(4) COMP-X.
                flags                  PIC X COMP-X.
                buffer                 PIC X(n).
                status-code            See ◄Key►
                                    -♦-