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+using System;
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+using System.Collections.Generic;
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+using System.Linq;
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+using System.Runtime.InteropServices;
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+using System.Text;
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+using System.Windows.Forms;
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+
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+namespace Azylee.Core.WindowsUtils.HookUtils
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+{
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+ /// <summary>
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+ /// 键盘钩子
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+ /// [以下代码来自某网友,并非本人原创]
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+ /// 测试发现有问题,暂不使用
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+ /// </summary>
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+ class KeyboardHook
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+ {
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+ public event System.Windows.Forms.KeyEventHandler KeyDownEvent;
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+ public event KeyPressEventHandler KeyPressEvent;
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+ public event System.Windows.Forms.KeyEventHandler KeyUpEvent;
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+
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+ public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
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+ static int hKeyboardHook = 0; //声明键盘钩子处理的初始值
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+ //值在Microsoft SDK的Winuser.h里查询
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+ // http://www.bianceng.cn/Programming/csharp/201410/45484.htm
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+ public const int WH_KEYBOARD_LL = 13; //线程键盘钩子监听鼠标消息设为2,全局键盘监听鼠标消息设为13
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+ HookProc KeyboardHookProcedure; //声明KeyboardHookProcedure作为HookProc类型
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+ //键盘结构
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+ [StructLayout(LayoutKind.Sequential)]
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+ public class KeyboardHookStruct
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+ {
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+ 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
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+ public int scanCode; // 指定的硬件扫描码的关键
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+ public int flags; // 键标志
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+ public int time; // 指定的时间戳记的这个讯息
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+ public int dwExtraInfo; // 指定额外信息相关的信息
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+ }
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+ //使用此功能,安装了一个钩子
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+ [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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+ public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
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+
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+
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+ //调用此函数卸载钩子
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+ [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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+ public static extern bool UnhookWindowsHookEx(int idHook);
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+
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+
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+ //使用此功能,通过信息钩子继续下一个钩子
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+ [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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+ public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
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+
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+ // 取得当前线程编号(线程钩子需要用到)
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+ [DllImport("kernel32.dll")]
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+ static extern int GetCurrentThreadId();
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+
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+ //使用WINDOWS API函数代替获取当前实例的函数,防止钩子失效
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+ [DllImport("kernel32.dll")]
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+ public static extern IntPtr GetModuleHandle(string name);
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+
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+ public void Start()
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+ {
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+ // 安装键盘钩子
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+ if (hKeyboardHook == 0)
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+ {
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+ KeyboardHookProcedure = new HookProc(KeyboardHookProc);
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+ hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);
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+ //hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
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+ //************************************
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+ //键盘线程钩子
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+ //SetWindowsHookEx( 2,KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId());//指定要监听的线程idGetCurrentThreadId(),
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+ //键盘全局钩子,需要引用空间(using System.Reflection;)
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+ //SetWindowsHookEx( 13,MouseHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
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+ //
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+ //关于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函数将钩子加入到钩子链表中,说明一下四个参数:
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+ //idHook 钩子类型,即确定钩子监听何种消息,上面的代码中设为2,即监听键盘消息并且是线程钩子,如果是全局钩子监听键盘消息应设为13,
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+ //线程钩子监听鼠标消息设为7,全局钩子监听鼠标消息设为14。lpfn 钩子子程的地址指针。如果dwThreadId参数为0 或是一个由别的进程创建的
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+ //线程的标识,lpfn必须指向DLL中的钩子子程。 除此以外,lpfn可以指向当前进程的一段钩子子程代码。钩子函数的入口地址,当钩子钩到任何
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+ //消息后便调用这个函数。hInstance应用程序实例的句柄。标识包含lpfn所指的子程的DLL。如果threadId 标识当前进程创建的一个线程,而且子
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+ //程代码位于当前进程,hInstance必须为NULL。可以很简单的设定其为本应用程序的实例句柄。threaded 与安装的钩子子程相关联的线程的标识符
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+ //如果为0,钩子子程与所有的线程关联,即为全局钩子
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+ //************************************
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+ //如果SetWindowsHookEx失败
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+ if (hKeyboardHook == 0)
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+ {
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+ Stop();
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+ throw new Exception("安装键盘钩子失败");
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+ }
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+ }
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+ }
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+ public void Stop()
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+ {
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+ bool retKeyboard = true;
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+
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+
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+ if (hKeyboardHook != 0)
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+ {
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+ retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
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+ hKeyboardHook = 0;
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+ }
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+
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+ if (!(retKeyboard)) throw new Exception("卸载钩子失败!");
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+ }
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+ //ToAscii职能的转换指定的虚拟键码和键盘状态的相应字符或字符
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+ [DllImport("user32")]
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+ public static extern int ToAscii(int uVirtKey, //[in] 指定虚拟关键代码进行翻译。
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+ int uScanCode, // [in] 指定的硬件扫描码的关键须翻译成英文。高阶位的这个值设定的关键,如果是(不压)
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+ byte[] lpbKeyState, // [in] 指针,以256字节数组,包含当前键盘的状态。每个元素(字节)的数组包含状态的一个关键。如果高阶位的字节是一套,关键是下跌(按下)。在低比特,如果设置表明,关键是对切换。在此功能,只有肘位的CAPS LOCK键是相关的。在切换状态的NUM个锁和滚动锁定键被忽略。
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+ byte[] lpwTransKey, // [out] 指针的缓冲区收到翻译字符或字符。
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+ int fuState); // [in] Specifies whether a menu is active. This parameter must be 1 if a menu is active, or 0 otherwise.
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+
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+ //获取按键的状态
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+ [DllImport("user32")]
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+ public static extern int GetKeyboardState(byte[] pbKeyState);
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+
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+
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+ [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
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+ private static extern short GetKeyState(int vKey);
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+
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+ private const int WM_KEYDOWN = 0x100;//KEYDOWN
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+ private const int WM_KEYUP = 0x101;//KEYUP
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+ private const int WM_SYSKEYDOWN = 0x104;//SYSKEYDOWN
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+ private const int WM_SYSKEYUP = 0x105;//SYSKEYUP
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+
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+ private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
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+ {
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+ // 侦听键盘事件
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+ if ((nCode >= 0) && (KeyDownEvent != null || KeyUpEvent != null || KeyPressEvent != null))
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+ {
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+ KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
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+ // raise KeyDown
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+ if (KeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
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+ {
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+ Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
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+ System.Windows.Forms.KeyEventArgs e = new System.Windows.Forms.KeyEventArgs(keyData);
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+ KeyDownEvent(this, e);
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+ }
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+
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+ //键盘按下
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+ if (KeyPressEvent != null && wParam == WM_KEYDOWN)
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+ {
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+ byte[] keyState = new byte[256];
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+ GetKeyboardState(keyState);
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+
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+ byte[] inBuffer = new byte[2];
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+ if (ToAscii(MyKeyboardHookStruct.vkCode, MyKeyboardHookStruct.scanCode, keyState, inBuffer, MyKeyboardHookStruct.flags) == 1)
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+ {
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+ KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);
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+ KeyPressEvent(this, e);
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+ }
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+ }
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+
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+ // 键盘抬起
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+ if (KeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
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+ {
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+ Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
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+ System.Windows.Forms.KeyEventArgs e = new System.Windows.Forms.KeyEventArgs(keyData);
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+ KeyUpEvent(this, e);
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+ }
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+
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+ }
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+ //如果返回1,则结束消息,这个消息到此为止,不再传递。
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+ //如果返回0或调用CallNextHookEx函数则消息出了这个钩子继续往下传递,也就是传给消息真正的接受者
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+ return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
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+ }
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+ ~KeyboardHook()
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+ {
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+ Stop();
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+ }
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+ }
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+}
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