SHLWAPI.DLLのバージョンの取得[ATL]

// Shell Lightweight Utility API Versions:

static HRESULT AtlGetShlwapiVersion(LPDWORD pdwMajor, LPDWORD pdwMinor)

{

    ATLASSERT(pdwMajor != NULL && pdwMinor != NULL);

    if(::IsBadWritePtr(pdwMajor, sizeof(DWORD)) || ::IsBadWritePtr(pdwMinor, sizeof(DWORD)))

        return E_INVALIDARG;

    DLLVERSIONINFO dvi;

    ::ZeroMemory(&dvi, sizeof(dvi));

    dvi.cbSize = sizeof(dvi);

    HRESULT hRet = AtlGetDllVersion(_T("Shlwapi.dll"), &dvi);

    if(SUCCEEDED(hRet))

    {

        *pdwMajor = dvi.dwMajorVersion;

        *pdwMinor = dvi.dwMinorVersion;

    }

    else if(hRet == E_NOTIMPL)

    {

        // If DllGetVersion is not there, then the DLL is a version

        // previous to the one shipped with IE 3.x

        *pdwMajor = 4;

        *pdwMinor = 0;

        hRet = S_OK;

    }

    return hRet;

};