URLDEcode function, how to get Request.Querystring values

how would i get the values from the decoded URL .
As usual, we would use Request.Querystring(key) to get the values from the Request Querystring.
But i do not know how to get the values from the decoded string.


Function UrlDecode(ByVal output)
 On Error Resume Next
   
    output = "" & output
    If output<>"" Then
     Dim i, h, ce, cd
       
        ' convert all pluses to spaces
        output = Replace(output, "+", " ")
       
        ' single quotes, not latin accent character
        output = Replace(output, "%22", Chr(34))
     
        ' convert %hexdigits to the character
        i = InStr(1, output, "%")
        Do While i>0
            h = "&H" & Mid(output, i+1, 2) & ""
            ce = "" & Mid(output, i, 3) & ""
            cd = "" & Chr(CLng(h)) & ""
            If cd <> "" Then
                ' HIDE % (%25 = %)
                If cd = "%" Then cd = "-!-"
                ' % is special - replacing it now would cause
                ' an endless loop. so let's just mark its location
                ' and replace it at the end of the routine
           
            Else
                ' if we can't produce a character, put string back
                ' and hide % sign until the end of the routine
                cd = Replace(ce, "%", "-!-")
           
            End If
           
            ' replace character
            output = Replace(output, ce, cd)
           
            ' find next hex character
            i = InStr(1, output, "%")
        Loop
       
  ' put % signs back
        output = Replace(output, "-!-", "%")
 
    End If
    URLDecode = output
End Function


..in html
<%=URLDEcode(Request.QueryString())%>

This just displays the querystring.  I have tried assigning the decoded string to a NewQuerystring but it doesnt work.  i.e. <% Query.Requeststring= URLDEcode(Request.QueryString())