//返回SZ000002（万科A）从20110905到20110909的区间最高收盘
SetSysParam(PN_Stock(),'SZ000002');
SetSysParam(PN_Rate(),1);
SetSysParam(PN_RateDay(),inttodate(20110909));
BegT:=inttodate(20110905);
EndT:=inttodate(20110909);
return StockHighClose(BegT,EndT);
//结果：8.12