I am trying to implement NTLM authentication on one of our internal sites and everything is working. The one piece of the puzzle I do not have is how to take the information fro
Hm, I'm not sure what you're trying to accomplish.
Usually implementing NTLM on an internal site is as simple as unchecking "Enable Anonymous Access" in "Authentication and Access Control" in the "Directory Security" tab of website properties in IIS. If that is cleared, then your web application users will see a pop-up NTLM dialog.
There's no need for you to write any code that interfaces with Active Directory. IIS takes care of the authentication for you.
Can you be more specific about what you're trying to do?