在C#中如何屏蔽ctrl+alt+delete？

Question

参考：
http://zhidao.baidu.com/link?url=alysgdkR0p5PS3so1gQ0p_MqAgLeOZ0Xi4qvzv0PUUxfn91AOVui2zUtIVHxJkwP_hdjtyUhAquk7YssB6R6HK

Answer 1

试试这样：
 #region 隐藏任务栏与任务管理器
        [DllImport("user32.dll", EntryPoint = "FindWindowA")]
        public static extern IntPtr FindWindowA(string lp1, string lp2);//获取任务栏        [DllImport("user32.dll", EntryPoint = "ShowWindow")]
        public static extern IntPtr ShowWindow(IntPtr hWnd, int _value);//显示/隐藏任务栏
        /**/
        /// <summary>
        /// 是否屏蔽CTRL+ALT+DEL
        /// </summary>
        /// <param name="i">1=屏蔽 0=取消屏蔽</param>
        public static void ShieldMissionTask(int i)
        {
            try
            {
                //屏蔽 Ctrl + Alt + Del 键
                RegistryKey key = Registry.CurrentUser;
                RegistryKey key1 = key.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System");
                key1.SetValue("DisableTaskMgr", i, Microsoft.Win32.RegistryValueKind.DWord);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }        /**/
        /// <summary>
        /// 是否显示任务栏
        /// </summary>
        /// <param name="i">5=显示 0=隐藏</param>
        public static void ShieldTaskBar(int i)
        {
            try
            {
                IntPtr hTray = FindWindowA("Shell_TrayWnd", String.Empty); //获取任务栏
                ShowWindow(hTray, i);    //隐藏任务栏
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }