[编程交流] 可以在dwg中存储数据吗？

(defun get-or-create-Dict (/ adict)
 ;;test if "MyDict" is already present in the main dictionary
 (if (not (setq adict (dictsearch (namedobjdict) "MyDict")))
   ;;if not present then create a new one and set the main
   ;; dictionary as owner
   (progn
     (setq adict (entmakex '((0 . "DICTIONARY")(100 . "AcDbDictionary"))))
     ;;if succesfully created, add it to the main dictionary
     (if adict (setq adict (dictadd (namedobjdict) "MyDict" adict)))
   )
   ;;if present then just return its entity name
   (setq adict (cdr (assoc -1 adict)))
 )
)
(defun get-or-make-Xrecord (/ adict anXrec)
; change to allow w1 etc and thickness 
 (cond
    ;;first get our dictionary. Notice that "MyDict" will be
   ;;created here in case it doesn't exist
   ((setq adict (get-or-create-Dict))
     (cond
       ;;if "MyDict" is now valid then look for "MyDictVARS" Xrecord 
      ((not (setq anXrec (dictsearch adict wallvar))) 
;the variable MyDictvars is name of xrecord so need to be a variable to add lots
       ;;if "MyDictVARS" was not found then create it
       ;(setq anXrec (entmakex '((0 . "XRECORD")
(setq anXrec (entmakex (list (cons 0  "XRECORD")
                               (cons 100  "AcDbXrecord")
                               ;(1 . wallvar)
   (cons 1 wallvar)
   (cons 40 wallsize)
    ;(40 . wallsize)
                               )
                    )
       )
       ;;if creation succeeded then add it to our dictionary
       (if anXrec (setq anXrec (dictadd adict wallvar anXrec)))
      )
      ;;if it's already present then just return its entity name
      (setq anXrec
       (cdr (assoc -1 (dictsearch adict wallvar)))
      )
    )
   )
 )
)
(defun getMyDictvars (/ vars varlist)
 ;;retrieve XRecord "wallvar" from dictionary "MyDict"
 ;;which in turn calls both functions above
 (setq vars (get-or-make-Xrecord))
 ;;if our Xrecord is found, then get values in group code 
 (cond (vars
        (setq varlist  (entget vars))
        (setq WALLname (cdr (assoc 1 varlist)))
        (setq WALLTHICK  (cdr (assoc 40 varlist)))
       )
       ;;otherwise return nil
       (T nil)
 )
)