如何屏蔽 Ctrl+ Alt+ Del 热键

Question

各位大虾~..帮忙用API写个屏蔽Ctrl+ Alt+ Del热键的程序吧~~。。晚上的饭就我了..你们也不用客气~~

Answer 1

参考这个：
http://www.codeproject.com/win32/AntonioWinLock.asp

Answer 2

protected override bool ProcessDialogKey(System.Windows.Forms.Keys  aKey)     
{
   if (aKey == Keys.Alt)
     {
          ......

Answer 3

这个不好解决，因为这个是系统设置的，优先级非常高的快捷键，我曾把Ctrl+Alt屏蔽掉了，但是还是无法屏蔽这3个组合的快捷键。当然也有办法就是修改主策略，或者注册表。
注：用钩子函数无法屏蔽这个组合键

Answer 4

转帖
using System;
using System.Runtime.InteropServices;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
namespace HookTest
{
/// <summary>
/// Hook 的摘要说明。
/// </summary>
public class Hook
{
public Hook()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
// 安装钩子
public const int WH_KEYBOARD = 13;
public const int WH_MOUSE_LL = 14;[DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);// 卸载钩子[DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]public static extern bool UnhookWindowsHookEx(int idHook);// 继续下一个钩子[DllImport("user32.dll",CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);  // 取得当前线程编号[DllImport("kernel32.dll")]
static extern int GetCurrentThreadId(); //定义委托
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
 static int hKeyboardHook = 0; 
HookProc KeyboardHookProcedure;//处理
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam){KeyMSG m = (KeyMSG) Marshal.PtrToStructure(lParam, typeof(KeyMSG));
if ((int) m.vkCode == 91){//textbox1.Text = “A”
//MessageBox.Show(wParam.ToString(),"dd");
return 1;}return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam); 
}
// 安装钩子
public void HookStart(){if(hKeyboardHook == 0){// 创建HookProc实例KeyboardHookProcedure = new HookProc(KeyboardHookProc);// 设置线程钩子//hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardHookProcedure, IntPtr.Zero, //GetCurrentThreadId());
hKeyboardHook = SetWindowsHookEx( WH_KEYBOARD,KeyboardHookProcedure,  Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);// 如果设置钩子失败if(hKeyboardHook == 0 )    {HookStop();throw new Exception("SetWindowsHookEx failedeeeeeeee.");}}}// 卸载钩子public void HookStop(){bool retKeyboard = true;if(hKeyboardHook != 0){retKeyboard = UnhookWindowsHookEx(hKeyboardHook);hKeyboardHook = 0;} if (!(retKeyboard)) 
{
throw new Exception("UnhookWindowsHookEx  failedsssss.");}
}
public struct KeyMSG{public int vkCode;  public int scanCode; public int flags;  public int time; public int dwExtraInfo; }
}
}