C# 通过Hook的方法 屏蔽快捷键

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

//LowLevel键盘截获，如果是WH_KEYBOARD＝2，并不能对系统键盘截取，会在你截取之前获得键盘。
private static HookProc KeyBoardHookProcedure;
//键盘Hook结构函数
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}

//设置钩子
[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)]
//抽掉钩子
public static extern bool UnhookWindowsHookEx(int idHook);

[DllImport("user32.dll")]
//调用下一个钩子
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);

//如果函数执行成功，返回值不为0。
//如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
[DllImport("user32.dll", SetLastError = true)]
public static extern bool RegisterHotKey(
IntPtr hWnd, //要定义热键的窗口的句柄
int id, //定义热键ID（不能与其它ID重复）
int fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
Keys vk //定义热键的内容
);

[DllImport("user32.dll", SetLastError = true)]
public static extern bool UnregisterHotKey(
IntPtr hWnd, //要取消热键的窗口的句柄
int id //要取消热键的ID
);

public static void Hook_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)
{
Hook_Clear();
}
}
}

//取消钩子事件
public static void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
//如果去掉钩子失败.
if (!retKeyboard) throw new Exception("Hook去除失败");
}

//这里可以添加自己想要的信息处理
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) // 截获左win(开始菜单键)
{
return 1;
}

if (kbh.vkCode == 92)// 截获右win(开始菜单键)
{
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.Escape && (int)Control.ModifierKeys == (int)Keys.Alt) //截获Alt+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 ((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;
}

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

} return 1;
}

return CallNextHookEx(hHook, nCode, wParam, lParam);
}

/// <summary>
/// 开打任务管理器快捷键为Windows底层按键
/// </summary>
/// <param name="bLock"></param>
public static void TaskMgrLocking(bool bLock)
{
if (bLock)//屏蔽任务管理器、并且不出现windows提示信息“任务管理器已被管理员禁用”
{
Process p = new Process();
p.StartInfo.WorkingDirectory = Environment.GetFolderPath(Environment.SpecialFolder.System);
p.StartInfo.FileName = "taskmgr.exe";
p.StartInfo.CreateNoWindow = true;
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.Start();
}
else//设置任务管理器为可启动状态
{
Process[] p = Process.GetProcesses();

foreach (Process p1 in p)
{
try
{
if (p1.ProcessName.ToLower().Trim() == "taskmgr")//这里判断是任务管理器
{
p1.Kill();
RegistryKey r = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", true);
r.SetValue("DisableTaskmgr", "0"); //设置任务管理器为可启动状态
Registry.CurrentUser.DeleteSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System");
}
}
catch
{
return;
}
}

}

}
#endregion

//调用
private void button1_Click(object sender, EventArgs e)
{
//启动钩子，处理钩子事件
Hook_Start();
//屏蔽任务管理器
TaskMgrLocking(true);
}
/// <summary>
/// 关闭窗口时事件
/// </summary>
//private void Form1_FormClosing(object sender, FormClosingEventArgs e)
//{ //注销Id号为100的热键设定
// UnregisterHotKey(Handle, 100); //注销Id号为101的热键设定
// UnregisterHotKey(Handle, 101); //注销Id号为102的热键设定
// UnregisterHotKey(Handle, 102); //注销Id号为103的热键设定
// UnregisterHotKey(Handle, 103);
// Hook_Clear();
// TaskMgrLocking(false);
// }