Creating SubDomain for an account on registration

I am working on a ASP.NET app hosted on IIS.

I want to give a s开发者_如何转开发eparate sub-domain (username.abc.com) or a directory (abc.com/username) access to different users upon registration.

I am not getting enough leads to do this with IIS. I got few links but those describe the solution in Apache.

Can any one please give me some leads to do this with ASP.NET/IIS programmatically? Thanks

You can have subdomains point to another server or another subfolder under the same server, with a different set of files including a web.config. It could be a totally separate project. You could have a landing page or site, and upon authentication, based on the user privileges or whatever, you can redirect him to the corresponding site/subdomain.

But you probably should not try to create them on the fly as it is unnecessary. There has to be a better model. I'm not sure if this is what you are asking but the question is not very clear.

UPDATE: Based on some input from asker, I believe this is related to url rewriting. See comments for details.