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实现功能： 开发环境： 开发工具：Visual Studio 2013 .NET Framework版本：4.5 实现代码：
public class HookUtil { #region windows api
/// <summary> /// 安装钩子 /// </summary> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
/// <summary> /// 继续下一个钩子 /// </summary> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
/// <summary> /// 卸载钩子 /// </summary> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook);
/// <summary> ///获取当前线程编号（线程钩子需要用到） [DllImport("kernel32.dll")] static extern int GetCurrentThreadId();
/// <summary> /// 获取当前实例的函数 /// </summary> [DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name);
/// <summary> /// 获取按键的状态 /// </summary> /// <param name="pbKeyState"></param> /// <returns></returns> [DllImport("user32")] public static extern int GetKeyboardState(byte[] pbKeyState);
/// <summary> /// 将指定的虚拟键码和键盘状态翻译为相应的字符或字符串 /// </summary> [DllImport("user32")] public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState,byte[] lpwTransKey,int fuState); #endregion
/// <summary> /// 键盘结构 /// </summary> [StructLayout(LayoutKind.Sequential)] public class KeyboardHookStruct { public int vkCode; //定一个虚拟键码。该代码必须有一个价值的范围1至254 public int scanCode; // 指定的硬件扫描码的关键 public int flags; // 键标志 public int time; // 指定的时间戳记的这个讯息 public int dwExtraInfo; // 指定额外信息相关的信息 }
//定义为键盘钩子 public int WH_KEYBOARD_LL = 13;
//相关键盘事件 public event KeyEventHandler KeyDownEvent; public event KeyPressEventHandler KeyPressEvent; public event KeyEventHandler KeyUpEvent;
//相关动作 private const int WM_KEYDOWN = 0x100;//KEYDOWN private const int WM_KEYUP = 0x101;//KEYUP private const int WM_SYSKEYDOWN = 0x104;//SYSKEYDOWN private const int WM_SYSKEYUP = 0x105;//SYSKEYUP
//hookid private int hookID = 0;
//向下传递数据 public Keys NoNextKeyCode;
/// <summary> /// 安装钩子 /// </summary> public void StartHook() { if (hookID == 0) { HookProc hookProc = new HookProc(KeyboardHookProc); hookID = SetWindowsHookEx(WH_KEYBOARD_LL, hookProc, GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);
if (hookID == 0) { StopHook(); throw new Exception("安装键盘钩子失败"); } } }
public void StopHook() { bool isStop = true; if (hookID != 0) { isStop = UnhookWindowsHookEx(hookID); hookID = 0; } if (!isStop) throw new Exception("卸载键盘钩子失败！"); }
/// <summary> /// 监听事件 /// </summary> private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam) { if ((nCode >= 0) && (KeyDownEvent != null || KeyUpEvent != null || KeyPressEvent != null)) {
KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct)); //按下处理 if (KeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(keyData); KeyDownEvent(this, e); //阻止向下传递 if (NoNextKeyCode == keyData) { return hookID; } }
//按下并抬起处理 if (KeyPressEvent != null && wParam == WM_KEYDOWN) { byte[] keyState = new byte[256]; GetKeyboardState(keyState);
byte[] inBuffer = new byte[2]; if (ToAscii(MyKeyboardHookStruct.vkCode, MyKeyboardHookStruct.scanCode, keyState, inBuffer, MyKeyboardHookStruct.flags) == 1) { KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]); KeyPressEvent(this, e); } }
// 抬起处理 if (KeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(keyData); KeyUpEvent(this, e); }
} return CallNextHookEx(hookID, nCode, wParam, lParam); }
~HookUtil() { StopHook(); } }
HookUtil keyHook = new HookUtil(); private void btnBegin_Click(object sender, EventArgs e) { keyHook.KeyDownEvent += new KeyEventHandler(hook_KeyDown);//钩住按下事件 keyHook.StartHook(); btnBegin.Enabled = false; btnEnd.Enabled = true; }
private void btnEnd_Click(object sender, EventArgs e) { keyHook.StopHook(); btnBegin.Enabled = true; btnEnd.Enabled = false; }
private void btnInfo_Click(object sender, EventArgs e) { string path = System.AppDomain.CurrentDomain.BaseDirectory + "log\\" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt"; if (!File.Exists(path)) { MessageBox.Show("还未监听到数据，请操作后再查看"); return; } var list = File.ReadAllLines(path).ToList().GroupBy(s => s).Select(s => new { s.Key, s.ToList().Count }).OrderByDescending(s => s.Count); FrmInfo frm = new FrmInfo(); frm.Show(); foreach (var item in list) { frm.addItems(new string[] { "", item.Key, item.Count + "" }); }
} private void hook_KeyDown(object sender, KeyEventArgs e) { if (!listKey.Contains(e.KeyData)) { if (Control.ModifierKeys != Keys.None) { WriteLog(Control.ModifierKeys + "+" + e.KeyData); } else { WriteLog(e.KeyData + ""); } } else { WriteLog(e.KeyData + ""); }
}
实现效果： 
由简入繁，拿来即用
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