CWinApp类 – 云博客

CWinApp类将封装应用程序的初始化，运行和终止。基于框架生成的应用程序必须有且只有一个对象的类派生自CWinApp,创建窗口前需要构造此对象

CWinApp从CWinThread公有派生，它构成了应用程序执行的主线程

成员变量：

技术图片

成员方法

CWinApp方法调用顺序：

MFC程序最先执行的不是WinMain函数

//构造函数源码
CWinApp::CWinApp(LPCTSTR lpszAppName) //参数有默认值NULL { if (lpszAppName != NULL) m_pszAppName = _tcsdup(lpszAppName); else m_pszAppName = NULL; // initialize CWinThread state
    AFX_MODULE_STATE* pModuleState = _AFX_CMDTARGET_GETSTATE(); ENSURE(pModuleState); AFX_MODULE_THREAD_STATE* pThreadState = pModuleState->m_thread; ENSURE(pThreadState); ASSERT(AfxGetThread() == NULL);  pThreadState->m_pCurrentWinThread = this;  ASSERT(AfxGetThread() == this); m_hThread = ::GetCurrentThread(); m_nThreadID = ::GetCurrentThreadId(); // initialize CWinApp state
    ASSERT(afxCurrentWinApp == NULL); // only one CWinApp object please
    pModuleState->m_pCurrentWinApp = this; ASSERT(AfxGetApp() == this); // in non-running state until WinMain
    m_hInstance = NULL; m_hLangResourceDLL = NULL; m_pszHelpFilePath = NULL; m_pszProfileName = NULL; m_pszRegistryKey = NULL; m_pszExeName = NULL; m_pszAppID = NULL; m_pRecentFileList = NULL; m_pDocManager = NULL; m_atomApp = m_atomSystemTopic = NULL; m_lpCmdLine = NULL; m_pCmdInfo = NULL; m_pDataRecoveryHandler = NULL; // initialize wait cursor state
    m_nWaitCursorCount = 0; m_hcurWaitCursorRestore = NULL; // initialize current printer state
    m_hDevMode = NULL; m_hDevNames = NULL; m_nNumPreviewPages = 0;     // not specified (defaults to 1) // initialize DAO state
    m_lpfnDaoTerm = NULL;   // will be set if AfxDaoInit called // other initialization
    m_bHelpMode = FALSE; m_eHelpType = afxWinHelp; m_nSafetyPoolSize = 512;        // default size
 m_dwRestartManagerSupportFlags = 0;    // don‘t support Restart Manager by default
    m_nAutosaveInterval = 5 * 60 * 1000;   // default autosave interval is 5 minutes (only has effect if autosave flag is set)
 m_bTaskbarInteractionEnabled = TRUE; // Detect the kind of OS:
 OSVERSIONINFO osvi; osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); // Fix for warnings when building against WinBlue build 9444.0.130614-1739 // warning C4996: ‘GetVersionExW‘: was declared deprecated // externalapis\windows\8.1\sdk\inc\sysinfoapi.h(442) // Deprecated. Use VerifyVersionInfo* or IsWindows* macros from VersionHelpers.
#pragma warning( disable : 4996 ) ::GetVersionEx(&osvi); #pragma warning( default : 4996 ) m_bIsWindows7 = (osvi.dwMajorVersion == 6) && (osvi.dwMinorVersion >= 1) || (osvi.dwMajorVersion > 6); // Taskbar initialization:
    m_bComInitialized = FALSE; m_pTaskbarList = NULL; m_pTaskbarList3 = NULL; m_bTaskBarInterfacesAvailable = TRUE; }