Remotely/Remotely_Library/Win32/WTSAPI32.cs

using System;
using System.Runtime.InteropServices;

namespace Remotely_Library.Win32_Classes
{
    public static class WTSAPI32
    {
        [StructLayout(LayoutKind.Sequential)]
        public struct WTS_SESSION_INFO
        {
            public Int32 SessionID;
            [MarshalAs(UnmanagedType.LPStr)]
            public String pWinStationName;
            public WTS_CONNECTSTATE_CLASS State;
        }
        public enum WTS_CONNECTSTATE_CLASS
        {
            WTSActive,
            WTSConnected,
            WTSConnectQuery,
            WTSShadow,
            WTSDisconnected,
            WTSIdle,
            WTSListen,
            WTSReset,
            WTSDown,
            WTSInit
        }
        public static IntPtr WTS_CURRENT_SERVER_HANDLE = IntPtr.Zero;

        [DllImport("wtsapi32.dll", SetLastError = true)]
        static extern IntPtr WTSOpenServer(string pServerName);

        [DllImport("wtsapi32.dll", SetLastError = true)]
        public static extern int WTSEnumerateSessions(
            System.IntPtr hServer,
            int Reserved,
            int Version,
            ref System.IntPtr ppSessionInfo,
            ref int pCount);

    }
}