主要实现代码

代码:

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall, SetLastError = true)]

private static extern int SetWindowsHookEx(

int idHook,

HookProc lpfn,

IntPtr hMod,

int dwThreadId);

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall, SetLastError = true)]

private static extern int UnhookWindowsHookEx(int idHook);

[DllImport("user32.dll", CharSet = CharSet.Auto,

CallingConvention = CallingConvention.StdCall)]

private static extern int CallNextHookEx(

int idHook,

int nCode,

int wParam,

IntPtr lParam);

[DllImport("user32")]

private static extern int ToAscii(

int uVirtKey,

int uScanCode,

byte[] lpbKeyState,

byte[] lpwTransKey,

int fuState);

[DllImport("user32")]

private static extern int GetKeyboardState(byte[] pbKeyState);

[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

private static extern short GetKeyState(int vKey);

使用SetWindowsHookEx函数(API函数)，指定一个Hook类型、自己的Hook过程是全局还是局部Hook，同时给出Hook过程的进入点，就可以轻松的安装自己的Hook。

代码:

// 创建鼠标实例.

MouseHookProcedure = new HookProc(MouseHookProc);

//安装 鼠标hook

hMouseHook = SetWindowsHookEx(

WH_MOUSE_LL,

MouseHookProcedure,

Marshal.GetHINSTANCE(

Assembly.GetExecutingAssembly().GetModules()[0]),

0);

// 创建键盘实例.

KeyboardHookProcedure = new HookProc(KeyboardHookProc);

//安装 键盘hook

hKeyboardHook = SetWindowsHookEx(

WH_KEYBOARD_LL,

KeyboardHookProcedure,

Marshal.GetHINSTANCE(

Assembly.GetExecutingAssembly().GetModules()[0]),

0);

卸载Hook UnhookWindowsHookEx()函数(API函数)