得到程序自身的版本号

CString CsiphelloApp::GetVersion()
...{
    if (m_version.IsEmpty()) //如果已经计算一次，则不用再算了，直接返回
    ...{
        TCHAR szFullPath[MAX_PATH];
        DWORD dwVerInfoSize = 0;
        DWORD dwVerHnd;
        VS_FIXEDFILEINFO * pFileInfo;

        GetModuleFileName(NULL, szFullPath, sizeof(szFullPath));
        dwVerInfoSize = GetFileVersionInfoSize(szFullPath, &dwVerHnd);
        if (dwVerInfoSize)
        ...{
            // If we were able to get the information, process it:
            HANDLE  hMem;
            LPVOID  lpvMem;
            unsigned int uInfoSize = 0;

            hMem = GlobalAlloc(GMEM_MOVEABLE, dwVerInfoSize);
            lpvMem = GlobalLock(hMem);
            GetFileVersionInfo(szFullPath, dwVerHnd, dwVerInfoSize, lpvMem);

            ::VerQueryValue(lpvMem, (LPTSTR)_T("/"), (void**)&pFileInfo, &uInfoSize);

            WORD m_nProdVersion[4];

            // Product version from the FILEVERSION of the version info resource 
            m_nProdVersion[0] = HIWORD(pFileInfo->dwProductVersionMS); 
            m_nProdVersion[1] = LOWORD(pFileInfo->dwProductVersionMS);
            m_nProdVersion[2] = HIWORD(pFileInfo->dwProductVersionLS);
            m_nProdVersion[3] = LOWORD(pFileInfo->dwProductVersionLS); 

            m_version.Format(_T("Version %d.%d.%d.%d"),m_nProdVersion[0],
                m_nProdVersion[1],m_nProdVersion[2],m_nProdVersion[3]);

            GlobalUnlock(hMem);
            GlobalFree(hMem);
        }
    }
    return m_version;
}