Adds an event handler for the "buttonClick" event notification. This event is sent whenever a button on the ToolBar is clicked. The handle to the object is passed to listeners of this event. Duplicates adds are not filtered out.
[Visual Basic] Public Sub AddOnButtonClick( _ ByVal handler As ToolBarButtonClickEventHandler _ ) [C#] public void AddOnButtonClick( ToolBarButtonClickEventHandler handler ); [C++] public: void AddOnButtonClick( ToolBarButtonClickEventHandler* handler ); [JScript] public function AddOnButtonClick( handler : ToolBarButtonClickEventHandler );