Ok, I've seen alot of authenication with asp.net. I have a couple of things I want to try that will not, or may not have access to a web.net.
1). I want to authenicate with a windows desktop app a user with the AD in a domain enviorment. Then, once I've authenicated this user, check to see if they are a member of an OU. How do I do this
Reason, I only want users that are part of a group to be able to modify data.
2). I want to see if a "local User" is part of a group. Then if user is in this group I want to be able to send a message to them saying they will be logged off soon.
Reason, If I log onto my home xp node, I can stay on as long as I want. If one of my kids log onto the computer, I want to log them off... say after 30 minutes..
Thanks for any suggestions... as long as the sugguests where helpful....LOL

Authenication and member of group
Erin
Hi,
You may take a look at the link below.
The DirectorySearcher code will work for Winform too.
Active Directory and LDAP
http://www.codeproject.com/csharp/activedirusers.asp
For local group, you may try to use the .NET buildin IsInRole method.
e.g.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MsgBox(My.User.IsInRole(ApplicationServices.BuiltInRole.Administrator))
End Sub
If you still have any concern, please feel free to post here.
Best regards,
Peter Huang