try {
    try {
      ReadFile=new TFileStream(szFilePath,fmOpenRead);
      WriteFile=new TFileStream(szTmpFilePath,fmCreate);
      for(ReadFile->Position=0;ReadFile->Size;ReadFile->Position++) {
        ReadFile->Read(&ucBuffer,sizeof(unsigned char));
        Endecrypt(&ucBuffer);
        WriteFile->Write(&ucBuffer,sizeof(unsigned char)); // <-- 이부분이 제대로 동작을 안합니다.
      } // for
    } catch(...) {
      return false;
    }
    return true;
  } __finally {
    delete ReadFile;
    delete WriteFile;
  } // try