I am fairly new to DNN but have been doing ASP.NET development for some time. I have written a custom ASP.NET web app that runs in an IFRAME in DNN. This web app communicates with a database and creates a demo license key and then emails that key to the person that has registered for it. My problem is, for the download of the application that needs the license key, it's installer is in a Secure File System section in my DNN portal. When I try to get the link to it, I just see the LinkClick.aspx page, which doesn't work since it is an http handler. 

Is there anyway that I can create a link that I can email to the user that they click to forward them to the secured resource, for example, you sign up for the demo, receive an email that contains the license key and link to the demo installer. When you click the link, if you are not logged into my portal, you get prompted to login and then prompted to download?

Thanks for any help.