Dim filterfor()As TypedValue={New TypedValue(0,“LINE”)}
Dim sf As SelectionFilter=新建SelectionFilter(filterfor)
Dim psr As PromptSelectionResult=ed.SelectAll(sf)
如果psr。状态=PromptStatus。那好吧
ed.WriteMessage(“无法在图形中找到线条。”)
其他的
ed.WriteMessage(“找到行!”)
如果结束