The Microsoft patterns & practices Smart Client Team has released the December 2005 release of the Composite UI Application Block (CAB) Hands on Labs (HOL).  You can get the labs here.  If you aren not familiar with the CAB, here is a description from the gotdotnet site:

"Are you considering a Smart Client approach to address the challenges of building Line of Business solutions that interact with many backend systems? Ever wondered what would the architecture and design of a complex UI would look like? Do you need to abstract the "plumbing" of such client applications so your business developers can focus their attention on building the business specific components rather than dealing with complex issues like threading, asynchronous requests, etc.? The Composite UI Application Block (CAB) could be a good candidate.

CAB is a guidance asset (an application block) based on .NET 2.0. It’s intended to provide proven practices to build complex UIs based on simpler “parts” (SmartParts as we call them, “WinParts” in other architectures). This is a recurrent pattern implemented in many well known examples."

-Marc

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