//首先从UTF8转到UNCODE//再从UNCODE转到ANSIint ConvUtf8ToAnsi(CString& strSource, CString& strChAnsi){      if (strSource.GetLength() <= 0)        return 0;       CString strWChUnicode;    strSource.TrimLeft();    strSource.TrimRight();       strChAnsi.Empty();    int iLenByWChNeed = MultiByteToWideChar(CP_UTF8, 0,                                            strSource.GetBuffer(0),                                            strSource.GetLength(), //MultiByteToWideChar                                            NULL, 0);    int iLenByWchDone = MultiByteToWideChar(CP_UTF8, 0,                                            strSource.GetBuffer(0),                                            strSource.GetLength(),                                            (LPWSTR)strWChUnicode.GetBuffer(iLenByWChNeed * 2),                                            iLenByWChNeed); //MultiByteToWideChar       strWChUnicode.ReleaseBuffer(iLenByWchDone * 2);    int iLenByChNeed  = WideCharToMultiByte(CP_ACP, 0,                                            (LPCWSTR)strWChUnicode.GetBuffer(0),                                            iLenByWchDone,                                            NULL, 0,                                            NULL, NULL);        int iLenByChDone  = WideCharToMultiByte(CP_ACP, 0,                                            (LPCWSTR)strWChUnicode.GetBuffer(0),                                            iLenByWchDone,                                            strChAnsi.GetBuffer(iLenByChNeed),                                            iLenByChNeed,                                            NULL, NULL);    strChAnsi.ReleaseBuffer(iLenByChDone);       if (iLenByWChNeed != iLenByWchDone || iLenByChNeed != iLenByChDone)        return 1;    return 0;   }