//证劵筛选函数
public WindData weqs(string planName, string options = "")
{
checkConnection();
object ocodes, ofields, otimes, odata;
int errCode;
odata = wdc.weqs_syn(planName, options, out ocodes, out ofields, out otimes, out errCode);
return(formatWD(new string[] { "" }, ofields, otimes, odata, errCode));
}