Circle inside the Block

;;;............FIND DETAILS OF CIRCLE INSIDE A BLOCK.........................

How can I  get the present location of the circle.[/quote]


if direction normal & 2D circle (1st level nested), try this simple conversion..
[code]

[color="green"];vlisp [/color]
(defun PtInsideBlock (en p / ob bp l )
 (setq	bp '(0. 0.)
ob (vlax-ename->vla-object en)
l  (mapcar ''((x) (vlax-get ob x))
	   (vl-list* 'ObjectName
		     'InsertionPoint
		     'Rotation
		     (mapcar ''((x) (strcat x "Effectivescalefactor")) '( "X" "Y" ))
		     ) 
	   )
p  (mapcar '* p (cdddr l))
) 
 (if (= (car l) "AcDbBlockReference")
  (mapcar '+ (cadr l) (polar bp (+ (angle bp p) (caddr l)) (distance bp p))
    ) 
   ) 
 ) 


[color="green"];pure vanilla [/color]
(defun PtInsideBlock (e p / bp e l )
 (setq bp '(0. 0.)
e (entget e)
 	l (mapcar ''((x)(cdr (assoc x e))) '(0 10 50 41 42 ))
p (mapcar '* p (cdddr l))
)
 (if (= (car l) "INSERT")
   (mapcar '+ (cadr l) (polar bp (+ (angle bp p) (caddr l)) (distance bp p))
)
   )
 )

 

assign en variable

(repeat (setq i (sslength xss2))
 (setq e(entget (setq [b][color="red"][u]en[/u][/color][/b] (ssname xss2 (setq i (1- i))))))
...
...
...
[color="red"](setq [b]center[/b] (cdr (assoc 10 get)))

(princ (strcat "\nCenter = "(vl-princ-to-string ([color="blue"]PtInsideBlock[/color] [b][u]en[/u][/b] [b]center[/b] ))))
[/color]
...
...
...

minimal tested which supports block with & w/out uniform scale