Window Service程序中如何获取登陆用户的信息

    在windows底层的api中，提供了以下的方法来满足需求：

    WTSGetActiveConsoleSessionId: 获取当前active User的 session ID。

    CreateProcessAsUser：用当前用户创建一个新的进程。

public static string GetCurrentActiveUser()
        {
            IntPtr hServer = IntPtr.Zero, state = IntPtr.Zero;
            uint bCount = 0;

            // obtain the currently active session id; every logged on user in the system has a unique session id
            uint dwSessionId = WTSGetActiveConsoleSessionId();
            string domain = string.Empty, userName = string.Empty;

            if (WTSQuerySessionInformation(hServer, (int)dwSessionId, WTSInfoClass.DomainName, out state, out bCount))
            {
                domain = Marshal.PtrToStringAuto(state);
            }

            if (WTSQuerySessionInformation(hServer, (int)dwSessionId, WTSInfoClass.UserName, out state, out bCount))
            {
                userName = Marshal.PtrToStringAuto(state);
            }

            return string.Format("{0}\\{1}", domain, userName);
        }