话不多说，直接上菜！
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace UI { public partial class Form2 : Form { Util.Hook hook; public Form2() { InitializeComponent(); this.FormBorderStyle = FormBorderStyle.None; this.WindowState = FormWindowState.Maximized; this.TopMost = true; hook = new Util.Hook(); hook.Start(); this.FormClosing += new FormClosingEventHandler(Form2_FormClosing); this.buttonExit.Click += new EventHandler(ButtonExit_Click); } private void Form2_FormClosing(object sender, FormClosingEventArgs e) { hook.Close(); } private void ButtonExit_Click(object sender, EventArgs e) { Application.Exit(); } } } using Microsoft.Win32; using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Runtime.InteropServices; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace Util { public class Hook : IDisposable { public delegate int HookProc(int nCode, int wParam, IntPtr lParam); static int hHook = 0; public const int WH_KEYBOARD_LL = 13; HookProc KeyBoardHookProcedure; [StructLayout(LayoutKind.Sequential)] public class KeyBoardHookStruct { public int vkCode; public int scanCode; public int flags; public int time; public int dwExtraInfo; } [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)] public static extern bool UnhookWindowsHookEx(int idHook); [DllImport("user32.dll")] public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam); [DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name); public void Start() { // 安装键盘钩子 if (hHook == 0) { KeyBoardHookProcedure = new HookProc(KeyBoardHookProc); hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0); //如果设置钩子失败. if (hHook == 0) Close(); else { RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System", true); if (key == null)//如果该项不存在的话，则创建该项 key = Registry.CurrentUser.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System"); key.SetValue("DisableTaskMgr", 1, RegistryValueKind.DWord); key.Close(); } } } public void Close() { bool retKeyboard = true; if (hHook != 0) { retKeyboard = UnhookWindowsHookEx(hHook); hHook = 0; } //如果去掉钩子失败. //if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed."); RegistryKey key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Policies\System", true); if (key != null) { key.DeleteValue("DisableTaskMgr", false); key.Close(); } } public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam) { if (nCode >= 0) { KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct)); if (kbh.vkCode == 91) // 截获左win(开始菜单键) return 1; if (kbh.vkCode == 92)// 截获右win return 1; if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc return 1; if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+f4 return 1; if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab return 1; if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc return 1; if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+空格 return 1; if (kbh.vkCode == 241) //截获F1 return 1; if (kbh.vkCode == (int)Keys.Control && kbh.vkCode == (int)Keys.Alt && kbh.vkCode == (int)Keys.Delete) return 1; if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt + (int)Keys.Delete) //截获Ctrl+Alt+Delete return 1; if ((int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift return 1; } return CallNextHookEx(hHook, nCode, wParam, lParam); } #region IDisposable 成员 public void Dispose() { Close(); } #endregion } }
