Building a Dynamic Web Registration Form - How would you do it?

[kjmcsd]

I'm sitting at work trying to figure out the best way to build a dynamic web registration form where the user can basically build the registration form using a Windows application by choosing the field or whatever and they get added to the db and the web page looks at the db and build the registration page. I really have no other idea as how to do this but that. My only problem is the user has to be able to customize the field name and type from within this client app. I'm trying to get other ideas so I will not create something ugly. Is there a cleaner, more efficient way to do this? Any idea welcome