Syntax:        TXTMARGIN(<expN>)

     Purpose:       Designates the setting of the top margin of the
                    logical page in rows.

     Argument:      <expN> is row set as the top margin.

     Returns:        0  Successful
                     1  <expN> not numeric

     Usage:         TXTMARGIN() is used to set your page top margin.

     Example:       * Set top margin to column 5
                    _ret_code = TXTMARGIN(5)

     See Also:      TXLMARGIN(), TXRMARGIN(), TXSETLPI(), TXCLRMRG()