Checks the specified object to determine whether it is a valid type derived from the System.Web.UI.WebControls.HotSpot class.
This method checks the specified object to determine whether it is a valid type derived from the System.Web.UI.WebControls.HotSpot class. Only an object of type System.Web.UI.WebControls.CircleHotSpot, System.Web.UI.WebControls.RectangleHotSpot, or System.Web.UI.WebControls.PolygonHotSpot is considered a valid type.
This method is used only by control developers.