System.Web.Security.MembershipUser user =
System.Web.Security.Membership.GetUser(Page.User.Identity.Name);
if (user != null)
user.ChangePassword(oldPassword,newPassword);
If you aren't prompting the user to enter a password you'll need to reset it
first like so
user.ChangePassword(user.ResetPassword(),newPassword);

Signature
Hope this helps,
Mark Fitzpatrick
Former Microsoft FrontPage MVP 199?-2006
> Hello,
>
[quoted text clipped - 3 lines]
> Thanks,
> Miguel