public static CThostFtdcMdApi CreateFtdcMdApi(string pszFlowPath)
        {
            global::System.IntPtr cPtr = CTPMarketCppWrapperPINVOKE.CThostFtdcMdApi_CreateFtdcMdApi__SWIG_2(pszFlowPath);
            CThostFtdcMdApi       ret  = (cPtr == global::System.IntPtr.Zero) ? null : new CThostFtdcMdApi(cPtr, false);

            return(ret);
        }