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using System; using System.Runtime.InteropServices; using System.Reflection; using System.Windows.Forms; namespace KeyboardHook { public enum KeyboardEvents { KeyDown = 0x0100, KeyUp = 0x0101, SystemKeyDown = 0x0104, SystemKeyUp = 0x0105 } [StructLayout(LayoutKind.Sequential)] public struct KeyboardHookStruct { public int vkCode; //表示一个在1到254间的虚似键盘码 public int scanCode; //表示硬件扫描码 public int flags; public int time; public int dwExtraInfo; } public delegate void KeyboardEventHandler(KeyboardEvents keyEvent, System.Windows.Forms.Keys key); public class Hook { public event KeyboardEventHandler KeyboardEvent; public enum HookType { WH_JOURNALRECORD = 0, WH_JOURNALPLAYBACK = 1, WH_KEYBOARD = 2, WH_GETMESSAGE = 3, WH_CALLWNDPROC = 4, WH_CBT = 5, WH_SYSMSGFILTER = 6, WH_MOUSE = 7, WH_HARDWARE = 8, WH_DEBUG = 9, WH_SHELL = 10, WH_FOREGROUNDIDLE = 11, WH_CALLWNDPROCRET = 12, WH_KEYBOARD_LL = 13, WH_MOUSE_LL = 14, WH_MSGFILTER = -1, } public delegate IntPtr HookProc(int code, int wParam, IntPtr lParam); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern IntPtr SetWindowsHookEx(HookType hookType, HookProc hook, IntPtr instance, int threadID); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern IntPtr CallNextHookEx(IntPtr hookHandle, int code, int wParam, IntPtr lParam); [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern bool UnhookWindowsHookEx(IntPtr hookHandle); private IntPtr instance; private IntPtr hookHandle; private int threadID; private HookProc hookProcEx; public Hook()