Active directory updates

We use Microfoft Management Console/Active Directory to maintain Email addresses, passwords to our web site, etc. I'm trying to set up a Visual Basic application that will allow certain users to do this themselves. Has anyone tried to connect the two applications?

The way it works now is I manually add them to the SQL 2000 tables. Then logon on to the active directory to set up their account. I can easily add the VB code to update SQL but I don't know how to connect it to update the active directory.

Hope I've given enough information...