COM+是什么东西？好用吗？有什么介绍它的好书？请各位告诉我？谢谢？

Question

to under COM+, read the following booksEssential COM
by Don BoxTransactional COM+: Building Scalable Applications
by Tim Ewaldto use it in .NET, seeServiced Component Overview
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconservicedcomponentoverview.aspBuilding a COM+ Client using C# and .NET
http://my.execpc.com/~gopalan/dotnet/complus/complus.net_accountmanagerclient.htmlBuilding a complete COM+ Server component using C# and .NET
http://my.execpc.com/~gopalan/dotnet/complus/complus.net_accountmanager.html