//安装钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);//卸下钩子的函数
[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", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);

public class Win32Api
{
public const int WM_KEYDOWN = 0x100;public const int WM_KEYUP = 0x101;public const int WM_SYSKEYDOWN = 0x104;public const int WM_SYSKEYUP = 0x105;public const int WH_KEYBOARD_LL = 13;[StructLayout(LayoutKind.Sequential)] //声明键盘钩子的封送结构类型public class 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 int HookProc(int nCode, Int32 wParam, IntPtr lParam);//安装钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);//卸下钩子的函数
[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", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);[DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern IntPtr GetModuleHandle(string lpModuleName);
}

public class KeyboardHook{int hHook;Win32Api.HookProc KeyboardHookDelegate;/// <summary>/// 安装键盘钩子/// </summary>public void SetHook(){KeyboardHookDelegate = new Win32Api.HookProc(KeyboardHookProc);ProcessModule cModule = Process.GetCurrentProcess().MainModule;var mh = Win32Api.GetModuleHandle(cModule.ModuleName);hHook = Win32Api.SetWindowsHookEx(Win32Api.WH_KEYBOARD_LL, KeyboardHookDelegate, mh, 0);}/// <summary>/// 卸载键盘钩子/// </summary>public void UnHook(){Win32Api.UnhookWindowsHookEx(hHook);}/// <summary>/// 获取键盘消息/// </summary>/// <param name="nCode"></param>/// <param name="wParam"></param>/// <param name="lParam"></param>/// <returns></returns>private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam){// 如果该消息被丢弃（nCode<0if (nCode >= 0){Win32Api.KeyboardHookStruct KeyDataFromHook = (Win32Api.KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(Win32Api.KeyboardHookStruct));int keyData = KeyDataFromHook.vkCode;//WM_KEYDOWN和WM_SYSKEYDOWN消息，将会引发OnKeyDownEvent事件if (OnKeyDownEvent != null && (wParam == Win32Api.WM_KEYDOWN || wParam == Win32Api.WM_SYSKEYDOWN)){// 此处触发键盘按下事件// keyData为按下键盘的值,对应 虚拟码
}//WM_KEYUP和WM_SYSKEYUP消息，将引发OnKeyUpEvent事件 if (OnKeyUpEvent != null && (wParam == Win32Api.WM_KEYUP || wParam == Win32Api.WM_SYSKEYUP)){// 此处触发键盘抬起事件
                }}return Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam);}
}

namespace System.Windows.Input
{// 摘要: //     提供在 Win32 虚拟键和 WPFSystem.Windows.Input.Key 枚举之间进行转换的静态方法。public static class KeyInterop{// 摘要: //     将 Win32 虚拟键转换为 WPFSystem.Windows.Input.Key。//// 参数: //   virtualKey://     要转换的虚拟键。//// 返回结果: //     WPF 键。public static Key KeyFromVirtualKey(int virtualKey);//// 摘要: //     将 WPFSystem.Windows.Input.Key 转换为 Win32 虚拟键。//// 参数: //   key://     要转换的 WPF。//// 返回结果: //     Win32 虚拟键。public static int VirtualKeyFromKey(Key key);}
}

KeyInterop.KeyFromVirtualKey(KeyData)