Windows服务启动时，如何与UI进行交互

可以参考MSDN《.NET Windows编程系列课程(14)：Windows 服务 (Level 200)》

   http://www.microsoft.com/china/msdn/events/webcasts/shared/webcast/Series/NETWindows.aspx

public partial class Server1 : ServiceBase
{
    Thread threadForm = null;
    public Server1()
    {
        InitializeComponent();
    }
    [DllImport("user32.dll")]
    static extern int GetDesktopWindow();

    [DllImport("user32.dll")]
    static extern IntPtr GetProcessWindowStation();

    [DllImport("kernel32.dll")]
    static extern IntPtr GetCurrentThreadId();

    [DllImport("user32.dll")]
    static extern IntPtr GetThreadDesktop(IntPtr dwThread);

    [DllImport("user32.dll")]
    static extern IntPtr OpenWindowStation(string a, bool b, int c);

    [DllImport("user32.dll")]
    static extern IntPtr OpenDesktop(string lpszDesktop, uint dwFlags,
    bool fInherit, uint dwDesiredAccess);

    [DllImport("user32.dll")]
    static extern IntPtr CloseDesktop(IntPtr p);

    [DllImport("rpcrt4.dll", SetLastError = true)]
    static extern IntPtr RpcImpersonateClient(int i);


    [DllImport("rpcrt4.dll", SetLastError = true)]
    static extern IntPtr RpcRevertToSelf();

    [DllImport("user32.dll")]
    static extern IntPtr SetThreadDesktop(IntPtr a);

    [DllImport("user32.dll")]
    static extern IntPtr SetProcessWindowStation(IntPtr a);
    [DllImport("user32.dll")]
    static extern IntPtr CloseWindowStation(IntPtr a);

    protected override void OnStart(string[] args)
    {
        threadForm = new Thread(new ThreadStart(FormShow));
        threadForm.Start();
    }

    protected override void OnStop()
    {
        if (threadForm != null)
        {
            if (threadForm.IsAlive)
            {
                threadForm.Abort();
                threadForm = null;
            }
        }

    }
    void FormShow()
    {

        GetDesktopWindow();
        IntPtr hwinstaSave = GetProcessWindowStation();
        IntPtr dwThreadId = GetCurrentThreadId();
        IntPtr hdeskSave = GetThreadDesktop(dwThreadId);
        IntPtr hwinstaUser = OpenWindowStation("WinSta0", false, 33554432);
        if (hwinstaUser == IntPtr.Zero)
        {
            RpcRevertToSelf();
            return;
        }
        SetProcessWindowStation(hwinstaUser);
        IntPtr hdeskUser = OpenDesktop("Default", 0, false, 33554432);
        RpcRevertToSelf();
        if (hdeskUser == IntPtr.Zero)
        {
            SetProcessWindowStation(hwinstaSave);
            CloseWindowStation(hwinstaUser);
            return;
        }
        SetThreadDesktop(hdeskUser);

        IntPtr dwGuiThreadId = dwThreadId;

        Form1 f = new Form1(); //此FORM1可以带notifyIcon，可以显示在托盘里，用户可点击托盘图标进行设置
        System.Windows.Forms.Application.Run(f);


        dwGuiThreadId = IntPtr.Zero;
        SetThreadDesktop(hdeskSave);
        SetProcessWindowStation(hwinstaSave);
        CloseDesktop(hdeskUser);
        CloseWindowStation(hwinstaUser);
    }

}

    public partial class Server1 : ServiceBase
    {
        Thread threadForm = null;
        public Server1()
        {
            InitializeComponent();
        }
        [DllImport("user32.dll")]
        static extern int GetDesktopWindow();
 
        [DllImport("user32.dll")]
        static extern IntPtr GetProcessWindowStation();
 
        [DllImport("kernel32.dll")]
        static extern IntPtr GetCurrentThreadId();
 
        [DllImport("user32.dll")]
        static extern IntPtr GetThreadDesktop(IntPtr dwThread);
 
        [DllImport("user32.dll")]
        static extern IntPtr OpenWindowStation(string a, bool b, int c);
 
        [DllImport("user32.dll")]
        static extern IntPtr OpenDesktop(string lpszDesktop, uint dwFlags,
        bool fInherit, uint dwDesiredAccess);
 
        [DllImport("user32.dll")]
        static extern IntPtr CloseDesktop(IntPtr p);
 
        [DllImport("rpcrt4.dll", SetLastError = true)]
        static extern IntPtr RpcImpersonateClient(int i);
 
 
        [DllImport("rpcrt4.dll", SetLastError = true)]
        static extern IntPtr RpcRevertToSelf();
 
        [DllImport("user32.dll")]
        static extern IntPtr SetThreadDesktop(IntPtr a);
 
        [DllImport("user32.dll")]
        static extern IntPtr SetProcessWindowStation(IntPtr a);
        [DllImport("user32.dll")]
        static extern IntPtr CloseWindowStation(IntPtr a);
 
        protected override void OnStart(string[] args)
        {
            threadForm = new Thread(new ThreadStart(FormShow));
            threadForm.Start();
        }
 
        protected override void OnStop()
        {
            if (threadForm != null)
            {
                if (threadForm.IsAlive)
                {
                    threadForm.Abort();
                    threadForm = null;
                }
            }
 
        }
        void FormShow()
        {
 
            GetDesktopWindow();
            IntPtr hwinstaSave = GetProcessWindowStation();
            IntPtr dwThreadId = GetCurrentThreadId();
            IntPtr hdeskSave = GetThreadDesktop(dwThreadId);
            IntPtr hwinstaUser = OpenWindowStation("WinSta0", false, 33554432);
            if (hwinstaUser == IntPtr.Zero)
            {
                RpcRevertToSelf();
                return;
            }
            SetProcessWindowStation(hwinstaUser);
            IntPtr hdeskUser = OpenDesktop("Default", 0, false, 33554432);
            RpcRevertToSelf();
            if (hdeskUser == IntPtr.Zero)
            {
                SetProcessWindowStation(hwinstaSave);
                CloseWindowStation(hwinstaUser);
                return;
            }
            SetThreadDesktop(hdeskUser);
 
            IntPtr dwGuiThreadId = dwThreadId;
 
            Form1 f = new Form1(); //此FORM1可以带notifyIcon，可以显示在托盘里，用户可点击托盘图标进行设置
            System.Windows.Forms.Application.Run(f);
 
 
            dwGuiThreadId = IntPtr.Zero;
            SetThreadDesktop(hdeskSave);
            SetProcessWindowStation(hwinstaSave);
            CloseDesktop(hdeskUser);
            CloseWindowStation(hwinstaUser);
        }
 
    }