How to invoke events across User Controls in ASP.NET

using System;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace EventsAcrossControls
{
	public class ReceiverControl : UserControl
	{
		protected Literal uxMessage;

		private void Page_Load (object sender, EventArgs e)
		{
			ButtonEvents events = new ButtonEvents(Context.Items);
			events.ImageButtonClicked += new ImageClickEventHandler(events_ImageButtonClicked);
			events.ButtonClicked += new EventHandler(events_ButtonClicked);
		}

		private void events_ImageButtonClicked (object sender, ImageClickEventArgs e)
		{
			uxMessage.Text =
				string.Format("Last event received from an image button at ({0}, {1})", e.X, e.Y);
		}

		private void events_ButtonClicked (object sender, EventArgs e)
		{
			uxMessage.Text = "Last event received from a button";
		}

		override protected void OnInit (EventArgs e)
		{
			InitializeComponent();
			base.OnInit(e);
		}

		private void InitializeComponent ()
		{
			Load += new EventHandler(Page_Load);
		}
	}
}