如何从头开始启动MFC应用程序？ [英] How do I start up an MFC application from scratch?

问题描述

换句话说，从一个空白的win32项目（无向导）。

In other words from a blank win32 project (no wizard).

这是我在哪里：

预处理器定义：WIN32

Preprocessor Definitions: WIN32

Linker-> System-> Subsystem = Console

Linker->System->Subsystem = Console

int _tmain()
{
    int nRetCode = 0;

    // initialize MFC and print and error on failure
    if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
    {
        // TODO: change error code to suit your needs
        _tprintf(_T("Fatal Error: MFC initialization failed\n"));
        return nRetCode = 1;
    }

    MyWinApp* app = new MyWinApp();

    app->InitApplication();
    app->InitInstance();

    app->Run();

    AfxWinTerm();

    return 0;
}


class MyWinApp: public CWinApp
{
public:
    BOOL InitInstance();

    int Run();
};


BOOL MyWinApp::InitInstance()
{
    return TRUE;
}

int MyWinApp::Run()
{
    return CWinThread::Run();
}

跳过CWinApp :: Run（），因为它查找主窗口。

Skipping over the CWinApp::Run() because it looks for a main window.

但是，在CWinThread :: Run（）中，ASSERT_VALID失败。

In CWinThread::Run() however, the ASSERT_VALID fails. At the top of quickwatch for this it says MyWinApp is invalid.

我需要以另一种方式创建MyWinApp吗？

Do I need to create MyWinApp in another way?

推荐答案

您可能会失败，因为您正在创建 CWinApp AfxWinInit 。在常规MFC应用程序中， CWinApp 是一个全局变量，它在 main 之前构建。这样，当MFC初始化时，它有一个有效的全局 CWinApp 到位。尝试：

You're probably failing because you're creating the CWinApp after you're calling AfxWinInit. In a regular MFC app, the CWinApp is a global variable, which is constructed before main. This way, when MFC is initialized, it has a valid global CWinApp in place. Try:

MyWinApp* app = new MyWinApp();   // ^moved up^

// initialize MFC and print and error on failure
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
    // TODO: change error code to suit your needs
    _tprintf(_T("Fatal Error: MFC initialization failed\n"));
    return nRetCode = 1;
}

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