ATT with area of certain layer

Hi,

I want to put some area measurements in my drawing in text, i want to do this with fields with the ATT text.

The problem is that i want the area of one layer (in total) and not just 1 'square'.

Is there an way to make an ATT text (or something else) that shows the total area of a certain layer (lets say i have 2 squares of 1m x 1m, the output must be 2 (m2).

Hope i made myself clear enough.

Shouldn't that be the area of all objects on a particular layer?

Yes Sir,

But i want it to be dynamic, so not just a piece of text what i have to update myself. Every time i add an new closed polyline i want it to add up, if its possible.

I know that would be error sensitive, but i know what i'm doing .

Haven't found a LISP routine quite like that yet but I did come across one by Jimmy Bergmark (JTB World blog) called AREAM.LSP that calculates the total area of all selected objects. I suppose it could be tweaked to do what you want.

i allready have an lisp that can do that, but that's manual labor and i am looking for an dynamic solution...

Perhaps someone else knows how to do it.