The element that is the site of the behavior.
[Visual Basic] Protected behaviorSite As IElementBehaviorSite [C#] protected IElementBehaviorSite behaviorSite; [C++] protected: IElementBehaviorSite* behaviorSite; [JScript] protected var behaviorSite : IElementBehaviorSite;
By default this is set to a null reference (in Visual Basic Nothing).
DHTMLBehavior Class | DHTMLBehavior Members | System.Web.UI.Design Namespace