(form "00623" (size 44  6)
  (help "00623_TIP_0")
  (heading "SAVE PLOT FILE")
  (label (position  2  3) (text "Plot File"))
  (field "plot_file_name" (position 16  3) (display_length  20)
    (max_length 40) (input allowed) (translate lower)(null disallowed)
    (file output (extension "*.dwf"))
    (help "00623_TIP_1"))
  (default_buttons)
)