请教ASP代码知识

以下代码看不懂,请高手帮助解释一下,多谢.
<%
Dim SqlItem,RsItem,Rs,Sql
Dim Action,FoundErr,ErrMsg
Dim ItemID,ItemName,WebName,ClassID,SpecialID,ListStr,ListPaingType,ListPaingStr2,ListPaingID1,ListPaingID2,ListPaingStr3,Flag,ItemCollecDate
Dim ListUrl
Dim CurrentPage,AllPage,iItem,ItemNum
Const MaxPerPage=20

Call Main()
Call CloseConn()
Call CloseConnItem()
%>