Property Item is 'ReadOnly'

What is meant by Property 'Item' is 'ReadOnly'.

Dim vRemote
Response.Cookies("vRemote") = Request.ServerVariables("REMOTE_ADDR")

According to SDK HELP file ...
If the variable is a read-only variable, the assignment must take place in a Shared or instance constructor appropriate for the type of the variable; otherwise a compile-time error occurs.

Can anyone show how to do this?

 

I have a default.aspx where it is consists of several 'include files'. (Actually I am upgrading my current ASP files to .NET.)Everytime a user click a link on this page(DEFAULT.ASPX), it will load the same page, however as this page is loaded it will now decide as to what 'included file' be displayed depending on the value of a QueryString returned. As to the code below

Dim vRemote
Response.Cookies("vRemote") = Request.ServerVariables("REMOTE_ADDR")

The purpose of this is simply to store the IP address of the user to a cookie called "vRemote" and which at a later time would be used to determine if the same IP (or user) is loading the page. If so, then I will not increment my counter.

Thanks.