C# 屏蔽windows功能鍵

對於觸屏的軟件來說，我們調出系統鍵盤以后，我們不想用戶回到桌面，這時候我們就需要屏蔽windows鍵，

 #region 屏蔽WIN功能鍵
        public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
        private static int hHook = 0;
        public const int WH_KEYBOARD_LL = 13;

        //LowLevel鍵盤截獲，如果是WH_KEYBOARD＝2，並不能對系統鍵盤截取，會在你截取之前獲得鍵盤。 
        private static HookProc KeyBoardHookProcedure;
        //鍵盤Hook結構函數 
        [StructLayout(LayoutKind.Sequential)]
        public class KeyBoardHookStruct
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }

        //設置鈎子 
        [DllImport("user32.dll")]
        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        //抽掉鈎子 
        public static extern bool UnhookWindowsHookEx(int idHook);

        [DllImport("user32.dll")]
        //調用下一個鈎子 
        public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);

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

        [DllImport("kernel32.dll")]
        public static extern IntPtr GetModuleHandle(string name);

        public static void Hook_Start()
        {
            // 安裝鍵盤鈎子 
            if (hHook == 0)
            {
                KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
                hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure,
                        GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);
                //如果設置鈎子失敗. 
                if (hHook == 0)
                {
                    Hook_Clear();
                }
            }
        }

        //取消鈎子事件 
        public static void Hook_Clear()
        {
            bool retKeyboard = true;
            if (hHook != 0)
            {
                retKeyboard = UnhookWindowsHookEx(hHook);
                hHook = 0;
            }
            //如果去掉鈎子失敗. 
            if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed.");
        }

        //這里可以添加自己想要的信息處理 
        private static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
        {
            if (nCode >= 0)
            {
                KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));

                if (kbh.vkCode == 91) // 截獲左win(開始菜單鍵) 
                {
                    return 1;
                }

                if (kbh.vkCode == 92)// 截獲右win 
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截獲Ctrl+Esc 
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截獲alt+f4 
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截獲alt+tab
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截獲Ctrl+Shift+Esc
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截獲alt+空格 
                {
                    return 1;
                }

                if (kbh.vkCode == 241) //截獲F1 
                {
                    return 1;
                }

                if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt + (int)Keys.Delete)      //截獲Ctrl+Alt+Delete 
                {
                    return 1;
                }

                if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截獲Ctrl+Shift 
                {
                    return 1;
                }

                if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt) //截獲Ctrl+Alt+空格 
                {
                    return 1;
                }
            }

            return CallNextHookEx(hHook, nCode, wParam, lParam);
        }
        public static void TaskMgrLocking(bool bLock)
        {
            if (bLock)
            {
                try
                {
                    RegistryKey r = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", true);
                    r.SetValue("DisableTaskmgr", "1"); //屏蔽任務管理器 
                }
                catch
                {
                    RegistryKey r = Registry.CurrentUser.CreateSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System");
                    r.SetValue("DisableTaskmgr", "0");
                }
            }
            else
            {
                Registry.CurrentUser.DeleteSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System");
            }
        }
        #endregion


        //  調用，這個需要放在主窗體的load方法中
        //private void Load(object sender, EventArgs e)
        //{
        //    Hook_Start();
        //}

        //卸載
        private void FormClosing(object sender, FormClosingEventArgs e)
        {
            Hook_Clear();
        }