Hi

Here is a KB article for your reference.

Use this step-by-step guide to create a .NET assembly containing a
publisher, a subscriber, and an interface for handling loosely coupled
events in Microsoft COM+ Services.

318185 HOW TO: Use Loosely Coupled Events from Visual Studio .NET
http://support.microsoft.com/?id=318185

Loosely Coupled Events
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/htm
l/cpconlooselycoupledevents.asp

Best regards,

Peter Huang
Microsoft Online Partner Support