键盘记录器-------HOOK的应用举例

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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 CDialog14 {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 objects10 // 11 #ifdef APSTUDIO_INVOKED12 #ifndef APSTUDIO_READONLY_SYMBOLS13 #define _APS_NEXT_RESOURCE_VALUE        10414 #define _APS_NEXT_COMMAND_VALUE         4000115 #define _APS_NEXT_CONTROL_VALUE         100116 #define _APS_NEXT_SYMED_VALUE           10117 #endif18 #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     else25     {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 #endif10 11 // 自定义与主程序通信的消息12 #define HM_KEY WM_USER + 10113 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