[LISP程序]：哪位高手进来帮忙看看一个关于批处理的vlisp!!

userzhluserzhl

下面的程序是能正常运行的：

(defun c:aa ();(/ app doc docs err errtmp file files newpath old_acadlspasdoc old_cmdecho path sset)
  (zhl_registry)
  (defun getFolder (str_title str_prompt /)
    (strcat (vl-string-right-trim "\\" (strcase (acet-ui-pickdir str_prompt
         (vl-string-right-trim "\\"
                 (getvar "dwgprefix")
         ) str_title
      )
           )
     ) "\\"
    )
  )
  (defun makeDirectory (dir /)(vl-mkdir dir))
  (defun userundo ()
    (setq *error* errtmp)
    (vlax-release-object docs)
    (vlax-release-object app)
    (setvar "cmdecho" old_cmdecho)
    (setvar "acadlspasdoc" old_acadlspasdoc)
    (princ)
  )
  (defun err (msg)(userundo))
  (setq errtmp *error*)
  (setq *error* err)
  (setq old_cmdecho (getvar "cmdecho"))
  (setvar "cmdecho" 0)
  (setq old_acadlspasdoc (getvar "acadlspasdoc"))
  (setvar "acadlspasdoc" 0)
  (setq app (vlax-get-acad-object))
  (setq docs (vla-get-documents app))
  (setq path (getFolder "请选择目录..." "请选择目录："))
  (setq files (vl-directory-files path "*.dwg" 1))
  (if files
    (progn
      (setq newpath (strcat path "处理文件\\"))
      (makeDirectory newpath)
      (foreach file files
(setq doc (vla-open docs (strcat path file)))
(setq sset (vla-get-activeselectionset doc))
(vla-export doc (strcat newpath file) "dxf" sset)
;(vla-save doc)
(vla-close doc :vlax-false)
(setq doc (vla-open docs (strcat newpath file ".dxf")))
(setq sset (vla-get-activeselectionset doc))
(vla-export doc (strcat path file) "dxf" sset)

;我想把上面这一句改成：输出所有DXF文件成DWG格式到Path下，并覆盖原来的DWG文件
(vla-close doc :vlax-false)
(vlax-release-object doc)
      )
    )
    (alert "所选目录无 .dwg 文件！请重新选择：")
  )
  (userundo)
  (setq *error* errtmp)
  (princ)
)