THT Ekran Kilidi Programı

public Form1()
        {
            
            ProcessModule objCurrentModule = Process.GetCurrentProcess().MainModule;
            objKeyboardProcess = new LowLevelKeyboardProc(captureKey);
            ptrHook = SetWindowsHookEx(13, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName), 0);
            InitializeComponent();
        }
       

        public **** KillCtrlAltDelete()
        {
            RegistryKey regkey;
            string keyValueInt = "1";
            string subKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System";

            try
            {
                regkey = Registry.CurrentUser.CreateSubKey(subKey);
                regkey.SetValue("DisableTaskMgr", keyValueInt);
                regkey.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
  
        [StructLayout(LayoutKind.Sequential)]
        private struct KeyboardDLLStruct
        {
            public Keys key;
            public int scanCode;
            public int flags;
            public int time;
            public IntPtr extra;
        }

        private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int id, LowLevelKeyboardProc callback, IntPtr hMod, uint dwThreadId);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool UnhookWindowsHookEx(IntPtr hook);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hook, int nCode, IntPtr wp, IntPtr lp);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string name);
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern short GetAsyncKeyState(Keys key);

        private IntPtr ptrHook;
        private LowLevelKeyboardProc objKeyboardProcess;


        private IntPtr captureKey(int nCode, IntPtr wp, IntPtr lp)
        {
            if (nCode >= 0)
            {
                KeyboardDLLStruct objKeyInfo = (KeyboardDLLStruct)Marshal.PtrToStructure(lp, typeof(KeyboardDLLStruct));

                if (objKeyInfo.key == Keys.RWin || objKeyInfo.key == Keys.LWin)
                {
                    return (IntPtr)1;
                }
            }
            return CallNextHookEx(ptrHook, nCode, wp, lp);
        }



        [DllImport("user32.dll")]

        [return: MarshalAs(UnmanagedType.Bool)]

        static extern bool SetForegroundWindow(IntPtr hWnd);

        private **** timer1_Tick(object sender, EventArgs e)
        {
            SetForegroundWindow(this.Handle);
        }

        private **** Form1_Load(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            timer1.Interval = 10;
            timer1.Start();
        }