[Samba] How to find out default values

[Jan Schäfer]

> >Is there any possibilty to find out these default values ?
>
> testparm
That was quick ! :-)
Thx.

Next one :

I'm currently trying to design a dialog where the user can 
edit the 
valid users, invalid users, write list, read list and admin users.
The dialog contains two lists, one with all possible users
and one list with the valid users (where the access rights can be changed)

My problem is now, where can I get all possible Samba users ?
Until now I've only got them from the smbpasswd file.
Are there other places where Samba users can be stored ?

Greetings,

	Jan Schäfer