Polyline molding-as-plumbing pipe length display

[ChiefTesoroTX]

I was (naively) thinking that %length% would work to display the length of a pipe.  Tried as many variations as I could find, all the online help references polyline area, but I've not seen anything for length.  I'm hoping to have it displayed in ft' in".  Is this easy, or are macros a whole new thing I need to go deep into?

[DBCooper]

Try using %perimeter% which will display it in inches.  I think you can use %perimeter.to_s("'-\"")% if you want feet and inches.