Removes the given handler for the "buttonClick" event. If there are duplicate entries, ALL are removed.
[Visual Basic] Public Sub RemoveOnButtonClick( _ ByVal handler As ToolBarButtonClickEventHandler _ ) [C#] public void RemoveOnButtonClick( ToolBarButtonClickEventHandler handler ); [C++] public: void RemoveOnButtonClick( ToolBarButtonClickEventHandler* handler ); [JScript] public function RemoveOnButtonClick( handler : ToolBarButtonClickEventHandler );