void ReqUserLogin()
{
ThostFtdcReqUserLoginField req = new ThostFtdcReqUserLoginField();
req.BrokerID = BROKER_ID;
req.UserID = INVESTOR_ID;
req.Password = PASSWORD;
int iResult = api.ReqUserLogin(req, ++iRequestID);
Console.WriteLine("--->>> 发送用户登录请求: " + ((iResult == 0) ? "成功" : "失败"));
}