Un ejemplo:
<%
dim fs,fname
set fs=Server.CreateObject("Scripting.FileSystemObject ")
set fname=fs.CreateTextFile("c:\test.txt",true)
fname.WriteLine("Hello World!")
fname.Close
set fname=nothing
set fs=nothing
%>
http://www.tutorial-web.com/asp/fso/ http://www.w3schools.com/asp/asp_ref_filesystem.asp