How to Share Session State Between Classic ASP and ASP.NET

http://msdn.microsoft.com/en-us/library/aa479313.aspx the subj. soluton creates COM object in .net that then is used by classic ASP to store sessions. ASP.net object stores session in SQL database

Writing Services Programmatically ( .net C# or VB.net)

http://msdn2.microsoft.com/en-us/library/aa984335(VS.71).aspx how to write a windows service [skeleton] in C#