[C#] 纯文本查看 复制代码
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace HookClass
{
/// <summary>
/// 键盘钩子(屏蔽键盘按键)
/// </summary>
public class Hook
{
//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;
}
//委托
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，Acrobat Reader会在你截取之前获得键盘。
public HookProc KeyBoardHookProcedure;
#region [DllImport("user32.dll")]
//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);
#endregion
#region 安装键盘钩子
/// <summary>
/// 安装键盘钩子
/// </summary>
public void Hook_Start()
{
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();
}
}
}
#endregion
#region 取消钩子事件
/// <summary>
/// 取消钩子事件
/// </summary>
public void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
}
#endregion
#region 屏蔽键盘
/// <summary>
/// 屏蔽键盘
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
KeyBoardHookStruct kbh =
(KeyBoardHookStruct) Marshal.PtrToStructure(lParam, typeof (KeyBoardHookStruct));
// 屏蔽左"WIN"、右"Win"
if ((kbh.vkCode == (int) Keys.LWin) || (kbh.vkCode == (int) Keys.RWin))
{
return 1;
}
//屏蔽Ctrl+Esc
if (kbh.vkCode == (int) Keys.Escape && (int) Control.ModifierKeys == (int) Keys.Control)
{
return 1;
}
//屏蔽Alt+f4
if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt)
{
return 1;
}
//屏蔽Alt+Esc
if (kbh.vkCode == (int) Keys.Escape && (int) Control.ModifierKeys == (int) Keys.Alt)
{
return 1;
}
//屏蔽Alt+Tab
if (kbh.vkCode == (int) Keys.Tab && (int) Control.ModifierKeys == (int) Keys.Alt)
{
return 1;
}
//截获Ctrl+Shift+Esc
if (kbh.vkCode == (int) Keys.Escape &&
(int) Control.ModifierKeys == (int) Keys.Control + (int) Keys.Shift)
{
return 1;
}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
#endregion
}
}
[C#] 纯文本查看 复制代码
using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace LockScreen
{
class MyHook
{
//消息函数的委托
public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
static int hHook = 0;
public const int WH_KEYBOARD_LL = 13;//底层键盘钩子
HookProc KeyBoardHookProcedure;
//按键信息结构
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
//安装钩子
[DllImport("user32.dll")]
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);
//下一个钩挂的函数
[DllImport("user32.dll")]
public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
//返回当前线程 ID
[DllImport("kernel32.dll")]
public static extern int GetCurrentThreadId();
//得到模块的句柄
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);
//安装钩子
public void InsertHook()
{
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
hHook = SetWindowsHookEx(WH_KEYBOARD_LL,
KeyBoardHookProcedure,
GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);
if (hHook == 0)
{
UnHook();
throw new Exception("设置Hook失败!");
}
}
}
//卸载钩子
public void UnHook()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
if (!retKeyboard) throw new Exception("卸载Hook失败!");
}
//按键消息的处理函数
public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
//KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
//添加自己的判断语句，如果符合要求的按键，就 return 1;
//没有判断直接 return 1;那么就屏蔽所有按键除了ctrl+alt+del
return 1;
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
}
}