范例:
//返回SZ000002(万科A)从20151218 9:30:00 到 20151218 15:00:00涨停持续1分钟打开次数
setsysparam(pn_stock(),'SZ000002');
BegTTime:= 20151218T+strtodatetime('09:00:00');
EndTTime:= 20151218T+strtodatetime('13:20:00');
t:=StockZtOpen(BegTTime, EndTTime,1);
return t;//1