(form "00001" (size 51  7)
  (heading "STRING FILE VOLUME REPORTS")
  (label (position  5  3) (text "Name of the format file to use"))
  (label (position  5  5) (text "No file extension is required (.fmt) assumed"))
  (field "file" (position  5  4) (display_length 40) (input allowed)
    (translate lower) (null disallowed) (max_length 40)
    (file (extension trim "*.fmt")))
  (default_buttons)
)