Using the Web Services and COM+ Event System in the .Net Application.

using System;
using System.Diagnostics;
using System.EnterpriseServices;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Security.Permissions;
using System.Threading;
//
using COMPlusEventSystem;
	
	[assembly: ApplicationName("EventClassLogMsg")]
	[assembly: ApplicationActivation(ActivationOption.Server)]
	[assembly: ApplicationAccessControl(Value = false, Authentication  = AuthenticationOption.None)]

#region COM+ Event System Interfaces
namespace COMPlusEventSystem
{
	//--------------------------< EventSystem  >--------------------------------------------------
	//
	[ComImport, Guid("4E14FBA2-2E22-11D1-9964-00C04FBBB345")]
	public class EventSystem {}
	[InterfaceType(ComInterfaceType.InterfaceIsIDispatch),Guid("4E14FB9F-2E22-11D1-9964-00C04FBBB345")]
	public interface IEventSystem
	{
		[PreserveSig]
		object Query([In, MarshalAs(UnmanagedType.BStr)] string progId, 
			[In, MarshalAs(UnmanagedType.BStr)] string queryCriteria, 
			[Out] out Int32 errorIndex);
		[PreserveSig]
		void Store([In, MarshalAs(UnmanagedType.BStr)] string progId, 
			[In, MarshalAs(UnmanagedType.Interface)] object pInterface);
		[PreserveSig]
		void Remove([In, MarshalAs(UnmanagedType.BStr)] string progId, 
			[In, MarshalAs(UnmanagedType.BStr)] string queryCriteria, 
			[Out] out Int32 errorIndex);
		[PreserveSig]
		string get_EventObjectChangeEventClassID();  
		[PreserveSig]
		object QueryS([In, MarshalAs(UnmanagedType.BStr)] string progId, 
			[Out] out Int32 errorIndex);
		[PreserveSig]
		void RemoveS([In, MarshalAs(UnmanagedType.BStr)] string progId, 
			[Out] out Int32 errorIndex);
	}
	//
	
	[ComImport, Guid("7542E960-79C7-11D1-88F9-0080C7D771BF")]
	public class EventSubcription {}
	[InterfaceType(ComInterfaceType.InterfaceIsIDispatch),Guid("4A6B0E15-2E38-11D1-9965-00C04FBBB345")]
	public interface IEventSubcription
	{
		string SubscriptionID { get; set; }
		string SubscriptionName { get; set; }
		string PublisherID { get; set; }
		string EventClassID { get; set; }
		string MethodName { get; set; }
		string SubscriberCLSID { get; set; }
		object SubscriberInterface { get; set; }
		bool   PerUser { get; set; }
		string OwnerSID { get; set; }
		bool   Enabled { get; set; }
		string Description { get; set; }
		string MachineName { get; set; }
		
		[PreserveSig]
		object GetPublisherProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName);
		[PreserveSig]
		void   PutPublisherProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName, ref object propertyValue);
		[PreserveSig]
		void   RemovePublisherProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName);
		[PreserveSig]
		object GetPublisherPropertyCollection();
		[PreserveSig]
		object GetSubscriberProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName);
		[PreserveSig]
		void   PutSubscriberProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName, ref object propertyValue);
		[PreserveSig]
		void   RemoveSubscriberProperty([In, MarshalAs(UnmanagedType.BStr)] string PropertyName);
		[PreserveSig]
		object GetSubscriberPropertyCollection();
		string InterfaceID { get; set; }
	}

	[InterfaceType(ComInterfaceType.InterfaceIsIDispatch),Guid("4A6B0E16-2E38-11D1-9965-00C04FBBB345")]
	public interface IEventSubcription2 : IEventSubcription							
	{
		string FilterCriteria { get; set; }
		string SubscriberMoniker { get; set; }
	}

}	
#endregion

namespace EventClassLogMsg
{
	[Guid("32F5CB45-F0CB-41e2-919E-54D884905F13")]
	public interface ILogMsg
	{
		void WriteLogMsg(string ticket, string msg);
	}

	// meta class
	[Guid("5AA8C91D-EA0F-405a-8840-95344038AF5A")]
	[EventClass]
	[Transaction(TransactionOption.Disabled)]
	[ObjectPooling(Enabled=true, MinPoolSize=10, MaxPoolSize=60)]
	[EventTrackingEnabled]
	public class EventClassLogMsg : ServicedComponent, ILogMsg
	{
		public void WriteLogMsg(string ticket, string msg){}
	}
}