示例：访问绘图特性 （AutoLISP/ActiveX）

该接口可作为 Document 对象的属性访问，以访问图形属性，如标题、主题、作者和关键字。IAcadSummaryInfo

在以下示例中，该接口用于向当前图形添加标准属性和自定义属性：IAcadSummaryInfo

(vl-load-com)
(defun c:ADD_PROPS (/ doc db si author nc nc2 nc3 value3 value4)
  (setq doc (vla-get-ActiveDocument (vlax-get-Acad-Object)))
  (setq db (vla-get-Database doc))
  (setq si (vla-get-SummaryInfo db))

  (vla-put-author si "John")
  (vla-put-comments si "New comments")
  (vla-put-hyperlinkbase si "https://www.autodesk.com")
  (vla-put-keywords si "New keywords")

  (vla-AddCustomInfo si "siPutKey" "siPutValue")

  (setq nc (vla-numcustominfo si))
  (vla-SetCustomByKey si "siPutKey" "siPutValueByKey")
  (vla-GetCustomByKey si "siPutKey" 'value3)

  (if (/= "siPutValueByKey" value3)
    (princ "*** Error SetCustomByKey\n")
  )

  (vla-SetCustomByIndex si (1- nc) "siPutCustomByIndexKey" "siPutCustomByIndexValue")
  (vla-GetCustomByKey si "siPutCustomByIndexKey" 'value4)

  (if (/= "siPutCustomByIndexValue" value4)
    (princ "*** Error SetCustomByIndex\n")
  )

  (vla-RemoveCustomByIndex si (1- nc))

  (setq nc2 (vla-numcustominfo si))
  (if (/= nc2 (1- nc))
    (princ "*** Error RemoveCustomByIndex")
  )

  (vla-AddCustomInfo si "siPutKey" "siPutValue")

  ; Remove property
  (vla-RemoveCustomByKey si "siPutKey")
  (setq nc3 (vla-numcustominfo si))
  (if (/= nc2 (1- nc))
    (princ "*** Error RemoveCustomByKey")
  )

  (vla-AddCustomInfo si "siPutKey" "siPutValue")

  (vlax-release-object si)
  (vlax-release-object db)
  (vlax-release-object doc)
 (princ)
)
(princ)

可以使用接口读取图形属性，如以下示例所示：IAcadSummaryInfo

(vl-load-com)
(defun c:GET_PROPS (/ doc db si author )
  (if (/= "MyDrawing.dwg" (getvar "DWGNAME"))
    (princ "Open MyDrawing.dwg")
    (progn
      (setq doc (vla-get-ActiveDocument (vlax-get-Acad-Object)))
      (setq db (vla-get-Database doc))
      (setq si (vla-get-SummaryInfo db))

      (princ "\nAuthor: \n")
      (if (/= "John" (setq author (vla-get-author si)))
        (princ "*** vla-get-author error")
        (princ author)
      )
      (princ "\n")
      (princ "\nComments:\n ")
      (princ (vla-get-comments si))
      (princ "\n")
      (princ "\nHyperlink-base: \n")
      (princ (vla-get-HyperlinkBase si))
      (princ "\n")
      (princ "\nNumber of custom properties: ")
      (princ (setq nc (vla-numcustominfo si)))
      (princ "\n")
      (while (> nc 0)
        (princ "Custom property ")
        (princ nc)
        (vla-GetCustomByIndex si (- nc 1) 'key 'value)
        (princ ": key(")
        (princ key)
        (princ ")")
        (princ " value(")
        (princ value)
        (princ ")\n")
        (vla-GetCustomByKey si key 'value2)
        (if (/= value value2)
          (princ "\n*** Error GetCustomByKey returned unexpected result.\n")
        )
        (setq nc (1- nc))
      )
      (vlax-release-object si)
      (vlax-release-object db)
      (vlax-release-object doc)
    )
  )
 (princ)
)