If you need examples of some of the current Microsoft technologies, you have many technologies and programming languages available. For each of these technologies/languages you need to find a fitting example.

On CodePlex there is now an example-collection for most of the available technologies (COM, ActiveX-Control, ActiveX-Host, ADO, ADO.NET, Outlook-Customizing, DLL, DLL-delay-loaded, LIB, P/Invoke, CLR-hosting / named-pipes, mailslots, shared-memory, remoting) and programming languages (C/C++ (native / MFC / ATL) / C# / VB.NET):

Check out: All-In-One Code Framework