最近由于项目中需要精确记录某些操作的发生时间，但又没有办法打日志，因此写了个小工具，用来记录当前的毫秒级本机时间。
注意事项：
（程序内部实现了全局钩子，监听所有的键盘事件,即KeyDown,KeyUp事件。）
工具功能如下：
1.通过任意键盘按键来记录当前时间
2.可以在列表处单击记录当前时间
C#中对于Hook API的包装如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
namespace HookLib
{
public static class HookHelper
{
public delegate int HookProc(
int nCode,
IntPtr wParam,
IntPtr lParam
);
public static int HookCallback( int nCode, IntPtr wParam, IntPtr lParam)
{
if (IntPtr .Zero == HookPtr || null == HookId)
{
return 0;
}
if (nCode >= 0)
{
if (null != HookCallbackEvent)
{
return HookCallbackEvent(nCode, wParam, lParam);
}
}
return CallNextHookEx(HookPtr, HookId.Value, wParam, lParam);
}
public static IntPtr SetWindowsHookEx()
{
if (null == HookId)
{
throw new Exception( "You must set HookId first!" );
}
HookPtr = SetWindowsHookEx(
HookId.Value,
KeyboardCallback,
Instance,
0);
return HookPtr;
}
public static bool UnhookWindowsHookEx()
{
if (null == HookPtr || IntPtr.Zero == HookPtr)
{
throw new Exception( "HookPtr is null");
}
return UnhookWindowsHookEx(HookPtr);
}
public static int WH_KEYBOARD_LL = 13;
public static IntPtr HookPtr;
public static int? HookId = WH_KEYBOARD_LL;
public static event HookProc HookCallbackEvent;
public static HookProc KeyboardCallback = new HookProc (HookHelper.HookCallback);
public static IntPtr Instance = Marshal.GetHINSTANCE(Assembly .GetAssembly(typeof( HookHelper)).GetModules()[0]);
#region Win32API
[ DllImport("User32.dll" , CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall,
SetLastError = true)]
public static extern IntPtr SetWindowsHookEx(
int idHook,
HookProc lpfn, //如果是全局钩子，回调函数应该就写在dll内
IntPtr hMod, //如果是全局钩子，应该是包含lpfn方法的dll句柄，注意此句柄要保持生命周期
int dwThreadId //如果是全局钩子，置为0；否则应该是保护lpfn方法的进程id
);
[ DllImport("User32.dll" , CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall,
SetLastError = true)]
public static extern int CallNextHookEx(
IntPtr hhk,
int nCode,
IntPtr wParam,
IntPtr lParam
);
[ DllImport("User32.dll" , CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall,
SetLastError = true)]
public static extern bool UnhookWindowsHookEx(
IntPtr hhk
);
[ DllImport("Kernel32.dll" , CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
public static extern int GetLastError();
#endregion
}
}
HookHelper的用法：
1.可以使用原始的win32 api，如
public static extern IntPtr SetWindowsHookEx(
int idHook,
HookProc lpfn,
IntPtr hMod,
int dwThreadId
);
2.可以使用包装好的2个方法，只要外部指定要处理的HookId（安装何种类型的钩子），以及处理钩子的回调函数HookCallbackEvent， 如
private void MainView_Loaded (object sender, System .Windows. RoutedEventArgs e )
{
//Add hook
HookHelper.HookCallbackEvent += F5Proc;
HookHelper.HookId = HookHelper. WH_KEYBOARD_LL;
HookHelper.SetWindowsHookEx ();
}
注意事项：
1.如果是全局钩子，请把钩子的回调处理函数放在dll中
2.C#好像不支持wm_keyboard这样的钩子，需要替换为wm_keyboard_ll则可以
3.如果是全局钩子，请务必把进程实例设为回调函数所在dll的实例。
4.请保证回调处理函数的生命周期，要不然被垃圾回收器回收后找不到调用函数。