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Editorial Team
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Asked: 2026-05-12T08:08:08+00:00

I have the following line of code in my application: CString strAppName = AfxGetAppName();

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I have the following line of code in my application:

CString strAppName = AfxGetAppName();

Sometimes it fills strAppName up with garbage characters, and I can’t figure out why.

Anyone have any ideas?

TIA.

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1 Answer

  1. Editorial Team

    That is possible if you change m_pszAppName manually.

    At the very beginning of application initialization, AfxWinInit calls CWinApp::SetCurrentHandles, which caches the current value of the m_pszAppName pointer as follows:
    pModuleState->m_lpszCurrentAppName = m_pszAppName;

    That is, the module state struct holds a copy of the m_pszAppName pointer. If you change m_pszAppName in InitInstance as adviced in MSDN, you still have the old pointer value in pModuleState->m_lpszCurrentAppName. The AfxGetAppName() function returns AfxGetModuleState()->m_lpszCurrentAppName.

    You could add data breakpoint on m_lpszCurrentAppName and on m_pszAppName. It is initialized in <...>\Microsoft Visual Studio 9.0\VC\atlmfc\src\mfc\appinit.cpp file. You’ll see what is going on with that variable and who’s trying to change it.

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