Windows Servis yazmanız gerekirse şu kaynaklar faydalı olacaktır. Bir ara inşallah bir yazı yazabilirim.

Kaynaklar:

Visual Studio Programmer`s Guide for the .NET Framework: Windows Service Applications
http://msdn.microsoft.com/en-us/library/y817hyb6(VS.80).aspx

Windows Services: New Base Classes in .NET Make Writing a Windows Service Easy
http://msdn.microsoft.com/msdnmag/issues/01/12/NETServ/

Writing a Useful Windows Service in .NET in Five Minutes
http://blogs.msdn.com/bclteam/archive/2005/03/15/396428.aspx

How Do I...Write a Simple Service Application?
http://samples.gotdotnet.com/QuickStart/howto/default.aspx?url=/quickstart/howto/doc/SimpleService.aspx