Sometimes you want an area of polylines in acres. The code below will let you select one polyline at a time and return the cumulative area of the polylines selected. I’ve used a Sub to start the command and a function to loop until the user doesn’t select something. It might be able to be done in a better manner.
Here’s the completed code if you want to download it: http://style.civil3dreminders.com/AreaAcres.dvb It was created in Civil 3D 2010, so if you download the above file you might have to change the references.