Hi In one my project some developer who do not exist in my company wrote the code... in the default.aspx page there is a line in page_load mehtod
Dim code As String = Request.Item("Code") . problem is i m not able to figure out how the code key is gettting set. can any body help. in general scnerio how does this request.item works.

There are several ways this can be set. For example, you can append the following at the end your URL: ?Code=foo, which will set Request.Item("Code") to "foo".

Check the on-line document for HttpRequest class, and that should help.