Cstring 与string转换

判断对象是否构造完成

//string转从string
val_cloud_sta_ip = (station->param_ptr->m_cloud_sta_ip).c_str();

//从cstring转string
std::string path_std_str = (CW2A)strProgramPath.GetBuffer(0)/*(CT2A)(CString)(LPCTSTR)strProgramPath*/;