<%@ Language=VBScript %>
<% Option Explicit %>
<%
   'How many session variables are there?
   Response.Write "There are " & Session.Contents.Count & _
             " Session variables<P>"

   Dim strName, iLoop
   'Use a For Each ... Next to loop through the entire collection
   For Each strName in Session.Contents
     'Is this session variable an array?
     If IsArray(Session(strName)) then
       'If it is an array, loop through each element one at a time
       For iLoop = LBound(Session(strName)) to UBound(Session(strName))
          Response.Write strName & "(" & iLoop & ") - " & _
               Session(strName)(iLoop) & "<BR>"
       Next
     Else
       'We aren't dealing with an array, so just display the variable
       Response.Write strName & " - " & Session.Contents(strName) & "<BR>"
     End If
   Next

%>

http://www.psacake.com/web/hl.asp

List Session and Application Variables

Lista de variables de sesion y aplicación

ASP