Extension of the Content Editor Form to add event

ContentEditorExtension.cs

using Sitecore.Data.Events;
using Sitecore.Events;
using Sitecore.Experiment.Notification.Models;
using Sitecore.Shell.Applications.ContentManager;
using Sitecore.Web.UI.Sheer;
using System;

public class ContentEditorExtension : ContentEditorForm
{
	protected override void OnLoad(EventArgs e)
	{
		base.OnLoad(e);

		var site = Client.Site;

		site.Notifications.ItemSaved += new ItemSavedDelegate(this.CmsNotification);
	}

	private void CmsNotification(object sender, ItemSavedEventArgs args)
	{
		var model = new NotifierArgs
		{
			EventName = "item:save"
		};

		Event.RaiseEvent("cms:notify", model);
	}

	public override void HandleMessage(Message message)
	{
		base.HandleMessage(message);

		var model = new NotifierArgs
		{
			EventName = message.Arguments["eventName"]
		};

		switch (message.Name)
		{
			case "cms:notification":
				{
					Event.RaiseEvent("cms:notify", model);
					break;
				}
		}
	}
}