Find Role of User and role structure in ASP

Hi

I want to find out the following in an ASP page for a user

1) The roles assigned to the user.

2) For a particular role, whats the hyrarchie like workset id, folder id etc.

I need this information to generate the navigation target at runtime based upon the user logged in. I will have same pages under different hyrarchie in the different roles.

Can somebody please give any idea how to do this in ASP

Regards

Ajay