Reading the Account Option "User cannot change password" in Active Directory

Question

Hello all
I have an ASP.NET 2003 application (running Windows XP) that allows user to change and reset their Active Directory password. I'm using an admin account to query and reset the passwords once the user enters criteria to identify themselves. I want to check, in code, the Account Option "User cannot change password" in Active Directory to determine if they can or cannot change their password.

Any help is appreciated.

Thanks,
Frankie