void ReqQryInstrument()
{
ThostFtdcQryInstrumentField req = new ThostFtdcQryInstrumentField();
req.InstrumentID = INSTRUMENT_ID;
int iResult = api.ReqQryInstrument(req, ++iRequestID);
Console.WriteLine("--->>> 请求查询合约: " + ((iResult == 0) ? "成功" : "失败"));
}