Additions and changes made to the ActiveX API in AutoCAD 2009 and AutoCAD 2009-based products.
No changes
IAcadUnderlay3 (New)
        DWFFormat - Property
IAcadWipeout (New)
IAcadUtility2 (New)
        GetSubEntity32 - Method
        ObjectId32ToObjectIdString - Method
        GetObjectIdString - Method
IAcadToolbarItem2 (New)
        CommandDisplayName - Property