//回测开始
public WindData bktstart(string strategyName, string startDate, string endDate, string options = "")
{
checkConnection();
object ofields, odata;
int errCode;
odata = wdc.bktstart(strategyName, startDate, endDate, options, out ofields, out errCode);
return(formatWD(null, ofields, null, odata, errCode));
}
