(form "20510" (size 40 13)
    (heading "TOPS OF COLUMNS")
    (label 
        (position  5  3) 
        (text "Direction of column")
    )
    (field "axis" 
        (position 26  3) 
        (display_length  2) 
        (input allowed)
        (help "20510_TIP_0")   
        (value_in "X" "Y" "Z" "-X" "-Y" "-Z")
        (default "-Z")
        (null disallowed) 
        (max_length 2)
    )

    (label
        (position 5 4)
        (text "Nominal value above top")
    )
    (field "z"
        (position 26 4)
        (display_length 8)
        (max_length 12)
        (input allowed)
        (null disallowed)
        (format real_8)
        (help "20510_TIP_1")
    )

    (label 
        (position  5  6) 
        (text "Output file")
    )
    (label 
        (position 10  7) 
        (text "Location")
    )
    (field "location" 
        (position 20  7) 
        (display_length 15) 
        (input allowed)
        (null allowed) 
        (max_length 26)
        (file output (link "id") (extension "*.str"))
    )

    (label 
        (position 10  8) 
        (text "ID")
    )
    (field "id" 
        (position 20  8) 
        (display_length 10) 
        (input allowed)
        (format real_8) 
        (null disallowed) (max_length 16)
    )

    (label 
        (position  5 10) 
        (text "Constrain report?")
    )
    (field "constrain" 
        (position 26 10) 
        (display_length  2) 
        (input allowed)
        (value_in "Yes" "No")
        (default "Yes")
        (null disallowed) 
        (max_length 4)
    )
    (default_buttons)
)