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