成员的完整列表，这些成员属于 CThostFtdcInputOrderActionField,包括所有继承而来的类成员

ActionFlag	CThostFtdcInputOrderActionField
BrokerID	CThostFtdcInputOrderActionField
ExchangeID	CThostFtdcInputOrderActionField
FrontID	CThostFtdcInputOrderActionField
InstrumentID	CThostFtdcInputOrderActionField
InvestorID	CThostFtdcInputOrderActionField
InvestUnitID	CThostFtdcInputOrderActionField
IPAddress	CThostFtdcInputOrderActionField
LimitPrice	CThostFtdcInputOrderActionField
MacAddress	CThostFtdcInputOrderActionField
OrderActionRef	CThostFtdcInputOrderActionField
OrderRef	CThostFtdcInputOrderActionField
OrderSysID	CThostFtdcInputOrderActionField
RequestID	CThostFtdcInputOrderActionField
SessionID	CThostFtdcInputOrderActionField
UserID	CThostFtdcInputOrderActionField
VolumeChange	CThostFtdcInputOrderActionField