MFC实现普通登录验证码程序

// CAPTCHADlg.cpp : implementation file // #include "stdafx.h" #include "CAPTCHA.h" #include "CAPTCHADlg.h" #include <windowsx.h> #include "VerifyCode.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCAPTCHADlg dialog CCAPTCHADlg::CCAPTCHADlg(CWnd* pParent /*=NULL*/) : CDialog(CCAPTCHADlg::IDD, pParent) { //{{AFX_DATA_INIT(CCAPTCHADlg) // 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 CCAPTCHADlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CCAPTCHADlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CCAPTCHADlg, CDialog) //{{AFX_MSG_MAP(CCAPTCHADlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BTN_CHANGE, OnBtnChange) //}}AFX_MSG_MAP ON_WM_TIMER() END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCAPTCHADlg message handlers BOOL CCAPTCHADlg::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 SetTimer(1000, 100, NULL); return TRUE; // return TRUE unless you set the focus to a control } void CCAPTCHADlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // 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 CCAPTCHADlg::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 CCAPTCHADlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CCAPTCHADlg::OnBtnChange() { int picWidth = 120; int picHeight = 30; int codeNum = 5; CString strFile = CVerifyCode::Instance()->CreateVerifyCodePic(this->GetSafeHwnd(), picWidth, picHeight, codeNum); if(!strFile.IsEmpty()) { HANDLE m_hBitmap = ::LoadImage(NULL,strFile,IMAGE_BITMAP,0,0,LR_LOADFROMFILE); if(m_hBitmap != INVALID_HANDLE_VALUE) { CDC* pDC = GetDC(); CDC memDC; memDC.CreateCompatibleDC(pDC); CBitmap bitmap; bitmap.Attach(m_hBitmap); memDC.SelectObject(&bitmap); pDC->BitBlt(0,0,picWidth,picHeight,&memDC,0,0,SRCCOPY); bitmap.Detach(); memDC.DeleteDC(); ReleaseDC(pDC); } } } void CCAPTCHADlg::OnTimer(UINT_PTR nIDEvent) { // TODO: 在此添加消息处理程序代码和/或调用默认值 if (nIDEvent == 1000) { OnBtnChange(); KillTimer(nIDEvent); } CDialog::OnTimer(nIDEvent); }