HELP: password protect PDF through ASP?!?!?

Ok, this is the setup:

I have archived PDFs, but I want to restrict access to them to members only. Right now, my members only site uses a session variable to log in users.

Is there anyway to set it up so that users cannot open the PDFs unless they're logged in???

The problem is the members only site is seperate from the site where the PDFs reside. That is, a user goes to mymagazines.com and searches for sometext, and a list of links pops up with all the relevant matches, mostly PDFs. This entire process, is free for all to use.

But when they actually click on the link to the PDF, I want them to log in to the members only site. Is there any way to do this?

Any help would be greatly appreciated.

Thanks

sounds like you want windows authentication on a directory which can be achieved through IIS (directory security tab in the properties window for the directory)

however each user will have to have an account on the box - you can create a user group that has no permissions and just put the users in there -- this is an untested idea -- the sites i use windows authentication on all authenticate the users with our PDC, but i think i'm on the right track to what you need.