public event EventResizeEventHandler EventResize

Public Event EventResize As EventResizeEventHandler

public:
 event EventResizeEventHandler^ EventResize {
	void add (EventResizeEventHandler^ value);
	void remove (EventResizeEventHandler^ value);
}

When user starts resizing the event, a shadow outlining the new size appears. When the mouse button is released, this event is fired on the server.
In the custom event handler you should decide whether the action is allowed. If so, update the persistent data storage (such as a database), call DataBind() and Update(). After calling Update() the events will be updated on the client-side.