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Hello again. I hope not to ban me for overwriting post. But today i found one very interesting function. And do some research how i can use it in some lisp and i found this method which i think is interesting. After my research 5-6 hours i cannot find any information how to use it. I take some info from Here and try everything i can. Also i try This because i think this will be more easy. I attach .dwg and code where is very wrong i think but... (defun LM:group-n ( l n / r ) (if l (cons (reverse (repeat n (setq r (cons (car l) r) l (cdr l)) r)) (LM:group-n l n) ) ) ) (defun gc:3dPointListToVariant (lst) (vlax-make-variant (vlax-safearray-fill (vlax-make-safearray vlax-VbDouble (cons 0 (1- (* 3 (length lst)))) ) (apply 'append lst) ) ) ) (defun c:dd2 (/ selL VnamL VnamS coord inv) (setq selL (car (entsel "\nSelect Poly.."))) (setq VnamL (vlax-ename->vla-object selL)) (setq coord (gc:3dPointListToVariant (LM:group-n (vlax-get VnamL 'coordinates) 3))) (setq selS (car (entsel "\nSelect volumeSurf.."))) (princ "\n") (setq VnamS (vlax-ename->vla-object selS)) (setq inv (vl-catch-all-apply 'vlax-invoke-method (list (vlax-get VnamS 'Statistics) 'BoundedVolumes coord))) (princ inv) ;(princ (vl-catch-all-error-message inv)) (princ) ) And only to say, dont be mad at me im not a programmer this is just hobby And thank for all help, where you gave me Test3.dwg