基于VC 6.0 MFC，开发的类似QQ截图程序源码，工程可以运行

// TestCameraDlg.cpp : implementation file // #include "stdafx.h" #include "TestCamera.h" #include "TestCameraDlg.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() ///////////////////////////////////////////////////////////////////////////// // CTestCameraDlg dialog CTestCameraDlg::CTestCameraDlg(CWnd* pParent /*=NULL*/) : CDialog(CTestCameraDlg::IDD, pParent) { //{{AFX_DATA_INIT(CTestCameraDlg) // 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 CTestCameraDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CTestCameraDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CTestCameraDlg, CDialog) //{{AFX_MSG_MAP(CTestCameraDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BUTTON1, OnButton1) ON_BN_CLICKED(IDC_BUTTON2, OnButton2) ON_BN_CLICKED(IDC_BUTTON3, OnButton3) ON_BN_CLICKED(IDC_BUTTON4, OnButton4) ON_BN_CLICKED(IDC_BUTTON5, OnButton5) ON_BN_CLICKED(IDC_BUTTON6, OnButton6) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CTestCameraDlg message handlers BOOL CTestCameraDlg::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 return TRUE; // return TRUE unless you set the focus to a control } void CTestCameraDlg::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 CTestCameraDlg::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 CTestCameraDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CTestCameraDlg::OnButton1() { typedef int (*FUN)(); HMODULE hInst = LoadLibrary(_T("D:\\MyProject\\TestCamera\\CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraSubArea"); if (pFunc != NULL) { pFunc(); } } } void CTestCameraDlg::OnButton2() { typedef void (*FUN)(); HMODULE hInst = LoadLibrary(_T("CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraWndArea"); if (pFunc != NULL) { pFunc(); } } } void CTestCameraDlg::OnButton3() { //这里要用 __stdcall, 使用其它调用方式都回出现异常 typedef int (__stdcall *FUN)(int, int, int); HMODULE hInst = LoadLibrary(_T("CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraScreen"); if (pFunc != NULL) { pFunc(1, 1, 0x40800000); } } } void CTestCameraDlg::OnButton4() { typedef int (__stdcall *FUN)(int, int, int); HMODULE hInst = LoadLibrary(_T("CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraScreen"); if (pFunc != NULL) { pFunc(2, 1, 0x40800000); } } } void CTestCameraDlg::OnButton5() { typedef int (__stdcall *FUN)(int, int, int); HMODULE hInst = LoadLibrary(_T("CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraScreen"); if (pFunc != NULL) { pFunc(1, 0, 0x40800000); } } } void CTestCameraDlg::OnButton6() { typedef int (__stdcall *FUN)(int, int, int); HMODULE hInst = LoadLibrary(_T("CameraWnd.dll")); if (hInst != NULL) { FUN pFunc = (FUN)GetProcAddress(hInst, "CameraScreen"); if (pFunc != NULL) { pFunc(2, 0, 0x40800000); } } }