WINDOWS调用出错后，得到信息字串

//使用#define处理
LPVOID lpMsgBuf;
FormatMessage(
    FORMAT_MESSAGE_ALLOCATE_BUFFER |
    FORMAT_MESSAGE_FROM_SYSTEM |
    FORMAT_MESSAGE_IGNORE_INSERTS,
    NULL,
    GetLastError(),
    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
    (LPTSTR) &lpMsgBuf,
    0,
    NULL
    );
MessageBox((LPCTSTR)lpMsgBuf, _T("Error"), MB_OK | MB_ICONINFORMATION );
// Free the buffer.
LocalFree( lpMsgBuf );