I'm guessing your query is "How do I get the ASP session ID in an IIS (Windows) web server?".

The answer is - In your script, obtain the value of
Request->ServerVariables (HTTP_COOKIE)

The Data will contain something like
HTTP_COOKIE=MYCOOKIE=KEY1=AB&KEY2=AB; ASPSESSIONID=QWWNJOMYGIPZUYJN

You then need to parse out the ASPSESSIONID part.

Details at http://www.microsoft.com/windows2000/en/server/iis/htm/asp/vbob5vsj.htm