How to programatically find out the last login time to a machine?

Question

I would like to a) programatically and b) remotely find out the last date/time that a user successfully logged into a Windows machine (via remote desktop or at the console).

Answer 1

You can use DirectoryServices to do this in C#:

using System.DirectoryServices;

        DirectoryEntry dirs = new DirectoryEntry("WinNT://" + Environment.MachineName);
        foreach (DirectoryEntry de in dirs.Children)
        {
            if (de.SchemaClassName == "User")
            {
                Console.WriteLine(de.Name);
                if (de.Properties["lastlogin"].Value != null)
                {
                    Console.WriteLine(de.Properties["lastlogin"].Value.ToString());
                }
                if (de.Properties["lastlogoff"].Value != null)
                {
                    Console.WriteLine(de.Properties["lastlogoff"].Value.ToString());
                }
            }
        }