(form "50114" (size 46  6)
  (heading "SELECT SEQUENCE PERIOD")
  (label (position  10  3) (text "Period Number"))
  (field "period" (position 25  3) (display_length 5) (input allowed)
    (low_bound 1) (high_bound 100000)
    (format integer_4) (null disallowed) (max_length 10))
  (default_buttons)
)