(form "01121" (size 30 6)
  (help "01121_TIP_0")
  (heading "EXPORT VRML FILE")

  (label (position 2  2) (text "File Name"))
  (field "vrml_name" (position 2  3) (display_length 25)
    (input allowed)
    (null disallowed) (max_length 256) (file (extension "*.wrl"))
    (help "01121_TIP_1"))

  (default_buttons)
)