Web Forms :: Retrieving Data From Remote Host?

I heve been sent some code as an example (BELOW in C#) with a login password, to request data from a remote site.

For example: A customer is givn a code from a remote site that contains his data. the customer then arrives at my site enterst the code on my sites form the script access the data from the remote site.

e.g. A customer enter my site > enters code> collects data from remote server> displays on my site> proceeds to checkout on my site.

I have no idea how to do this from the code example.

Code:using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

[Code]....