Set Windows/AD password so that it "never expires"?

Question

Here is my code:

using (DirectoryEntry AD = new DirectoryEntry("WinNT://" + Environment.MachineName +    ",computer"))
{
   DirectoryEntry NewUser = AD.Children.Add(username, "user");
   string password = username + "123";
   NewUser.Invoke("SetPassword", new object[] { password });
   NewUser.CommitChanges();
   NewUser.Close();
   DirectoryEntry grp;
   grp = AD.Children.Find(groupname, "group");
   if (grp != null)
    {
      grp.Invoke("Add", new object[] { NewUser.Path.ToString() });
    }
}

And what i want to do is to create a windows user and set the password never expired , But i do not know how to do this ?

Answer 1

*EDITED

For domain accounts:

int NON_EXPIRE_FLAG = 0x10000;
val = (int) NewUser.Properties["userAccountControl"].Value;
NewUser.Properties["userAccountControl"].Value = val | NON_EXPIRE_FLAG;
NewUser.CommitChanges();

For local accounts:

I believe you'd use "UserFlags" instead of userAccountControl. Also you would have to use ADS_UF_DONT_EXPIRE_PASSWD flag instead of NON_EXPIRE_FLAG as described in an article by Microsoft