How to change user account properties by ASP.NET?

From: Evgeny Zoldin (zoldin_at_hotmail.com)
Date: 11/23/04 

Date: Tue, 23 Nov 2004 22:13:10 +0100

Hi ALL.

I have the configuration:
    1. WinXP PRO with MS IIS 5.0 and installed ASP.NET
    2. ASP.NET application A configured to authenticate only users from
local Users group.

I would like to de the following:
    Logged on user is able through ASP.NET-Pages to change its own Logon
Username, Password and Full Name

I tried to implement it by the code (C#):

    DirectoryEntry deCurrUser = new DirectoryEntry("WinNT://" +
User.Identity.Name);
    deCurrUser.Invoke("SetPassword", new string[]{"123"} ); // ***

If the logged on user belongs only to Users group then the statement ***
causes Exception "SystemUnautherizedException: General access denied error".
But as soon as that user has been included into Administrators group the
statement *** is executed well.

I know about impersonation possibility, but it requires to type clear
Administrators username and password in code-behind class that will be
published on target server.

So, what should I do in order to give to user the ability to change its
username, password and full name?
May be orginize on the target server a group, add the users into the group
and gain to this group some specils rights?

Thanx
Evgeny

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