(defun get_folder (d txt / Dir Item Path l)
 (if (> (strlen d) 4)
  (progn
   (setq l (substr d (strlen d) 1))
   (if (or (= l "\\") (= l "/"))
    (setq d (substr d 2))
   )
  )
 )
 (cond
  ((setq Dir (vlax-invoke (vlax-get-or-create-object "Shell.Application") 'browseforfolder 0 txt 1 d))
   (cond
    ((not (vl-catch-all-error-p (vl-catch-all-apply 'vlax-invoke-method (list Dir 'Items))))
     (setq Item (vlax-invoke-method (vlax-invoke-method Dir 'Items) 'Item))
     (setq Path (vla-get-path Item))
    )
   );end cond
  )
 );end cond
 (if Dir (vlax-release-object Dir))
 (if Path (setq Path (vl-string-translate "/" "\\" Path)))
 (if Path (setq DwgPath Path))
 (if path (if (= (substr path (strlen path) 1) "\\") (setq path (substr path 1 (- (strlen path) 1)))))
 path
)

(setq adresar (get_folder "" "Zadej adresar")) 

(setq dir (getfiled "Select a directory to process..." "Start here" "dwg" 8))

;; AUTOR:
;; http://thatcadguy.blogspot.com/2009/10/batch-processing-autocad-drawings.html
;;
;;
;;
;;

(defun c:batch (/ dir files total ct docs doc)
(defun listAllFiles (path ext /)
(apply 'append
(cons
(mapcar
(function (lambda(x) (strcat path "\\" x)))
(vl-directory-files path ext 1)
)
(mapcar
(function (lambda(x) (listAllFiles (strcat path "\\" x) ext)))
(cddr (vl-directory-files path nil -1)) ; to exclude "." and ".."
)
)
)
)
(if (and
(setq dir (getfiled "Select a directory to process..." "Start here" "" 33))
(setq dir (vl-filename-directory dir))
)
(if (setq files (listAllFiles dir "*.dwg"))
(progn
(vl-load-com)
(setq total (itoa (length files))
ct 0
docs (vla-get-documents (vlax-get-acad-object))
)
(foreach file files
(setq doc (vla-open docs file)
ct (1+ ct)
)
(prompt (strcat "\r" (itoa ct) " of " total " drawings processed."))
(command "_.delay" "1000")
(vla-close doc :vlax-false)
)
(vlax-release-object doc)
(vlax-release-object docs)
)
(prompt (strcat "\nNo files of that type found in " dir " !"))
)
(prompt "\nNo path specified!")
)
(princ)
)
;;Add the .lsp file you're going to use to process the drawings to the startup suite (command: APPLOAD or Tools>Load Application). This .lsp file should end with (command "qsave") to save the drawing. DO NOT have (command "close") anywhere in the file, as this will cause an access violation and crash AutoCAD, because AutoCAD sucks.