Here's a quick one
- (defun c:FunForMe (/ Pts plst x1 x2 x3 x4 Pt2Pt Perim area str) (cond ((and (setq pts (ssget ":L" '((0 . "POINT")))) (progn (repeat (setq i (sslength pts)) (setq plst (cons (cdr (assoc 10 (entget (ssname pts (setq i (1- i)))))) plst) ) ) (setq plst (append plst (list (last (reverse plst))))) (repeat (sslength pts) (setq x1 (car (car plst)) x2 (cadr (car plst)) y1 (car (cadr plst)) y2 (cadr (cadr plst)) ) (setq Pt2Pt (cons (- (* x1 y2) (* x2 y1)) Pt2Pt)) (setq PeriM (cons (distance (car plst)(cadr plst)) PeriM)) (setq plst (cdr plst)) ) (setq Area (abs (/ (apply '+ Pt2pt) 2))) ) (setq str (if (or (= (getvar "lunits") 3) (= (getvar "lunits") 4)) (strcat (rtos (/ area 144) 2) " sq. ft.") (strcat (rtos Area 2) " m²") ) ) (print Str) (princ (strcat "\nPerimeter: "" (rtos (apply '+ Perim) 2 2) """)) ) ) )(princ) )
The thing i need to figure out now is sorting the PontList when using window selection. | 
