Is there a way with touch a block select similar block in selected reign of drawing?

Is there a way with touch a block select automatically similar block in selected reign of drawing via lisp code or command similar select?

Have you tried SSX ?

hi hosyn, i'm not sure your meaning of touching,

Try this simple dxf filter function,

(issget e i); argument e=reference entity & i=dxf index to be filtered

;Single dxf index-match ssget filter 
(defun issget  (_e _id / ss i e1 e2 lst ss1 next)
 (if
 (not (setq ss (ssget)))
         (setq ss(ssget "X")))
 
 (if ss (progn
 (setq i 0)
 (repeat (sslength ss)
   (setq e1 (ssname ss i))
   (if (apply 'equal
              (foreach en  (list e1 _e )
                (setq lst (cons (mapcar '(lambda (x) (cdr (assoc x (entget en)))) (list 0 _id))
                                lst)) 		;setq
                ) 				;foreach
              ) 				;apply
   (setq ss1 (cons e1 ss1))
     ) 					;if 
   (setq i  (1+ i)
         lst nil))				;repeat
 (setq next (ssadd))
 (foreach e2 ss1 (ssadd e2 next)) 		;foreach
 )						;progn
 nil)						;if
  ) ; defun

Example: Just pick a single entity, then [ENTER] ,or manually select

_$ (sslength (issget (car(entsel)) 8 )) ;

44 ;

Simple

(setq obj (entsel "pick block"))
(setq bname (assoc 2 (entget (car obj)))
(princ bname)
; just use bname in a ssget filter now.