.NET实现可交互的WINDOWS服务的实例代码(2)

///
        /// 停止此服务。
        ///
protectedoverridevoid 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);
        }

[DllImport("user32.dll")]
        staticexternint GetDesktopWindow();

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

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

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

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

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

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

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

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

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