以下是cad得帮助的一个例子，我把它放到了一个命令按钮的单击事件中，可是总提示出错，为什么阿
' This example adds objects to a selection set by prompting the user
' to select ones to add.
' Create the selection set
Dim ssetObj As AcadSelectionSet
Set ssetObj = ThisDrawing.SelectionSets.Add("TEST_SSET")
' Add objects to a selection set by prompting user to select on the screen
ssetObj.SelectOnScreen
以下是出错时的帮助信息
main window is invisible. To turn on the window, set the visible property of the application object to acTrue.
置顶卡
