Alan Thompson is back this month with a routine that calculates area from points you select. The routine gives you feedback in the form of a "rubber band" line so you can see what you have picked. (Although newer versions of AutoCAD do the same thing, older versions do not.) Start by loading the LISP file, then type in the command AFP. At this point, you can start selecting points. If you make a mistake, the AFP command allows you to Undo your last pick. When you are done, check the Command line for the result before pressing Enter to end the command.