public void ReqUserLogout() { ThostFtdcUserLogoutField logoutField = new ThostFtdcUserLogoutField(); logoutField.BrokerID = BROKER_ID; var ret = mdApi.ReqUserLogout(logoutField, iRequestID++); HandleStatusInternal("CTP发送用户登出请求:" + (ret == 0 ? "成功" : "失败,返回代码" + ret)); }