(form "00668" (size 47 6)

  (help "00668_TIP_0")

  (heading "DEFINE LAYER TO DISPLAY CONTOURS" )

  (label (position  2 3) 
  (text "Contour display layer" )
  )
  (field "contour_layer" (position 25 3) (display_length 20)
     (input allowed)
     (translate lower) (null disallowed)
     (max_length 20)
     (help "00668_TIP_1")
  )

  (default_buttons)
)