范例:
//返回SZ000002(万科A)在20110907的涨跌金额
SetSysParam(PN_Stock(),'SZ000002');
SetSysParam(PN_Date(),inttodate(20110907));
SetSysParam(PN_Cycle(),cy_day());
SetSysParam(PN_Rate(),1);
SetSysParam(PN_RateDay(),inttodate(20110907));
return StockPriceZd3();
//结果:0.12