I have this:

            ' Prepare Web request
            loHttpWebRequest = System.Net.HttpWebRequest.Create(cLoginUrl)
            loHttpWebRequest.Method = "POST"
            loHttpWebRequest.KeepAlive = True
            loHttpWebRequest.ContentType = "application/x-www-form-urlencoded"
            loHttpWebRequest.ContentLength = loByte.Length
            loHttpWebRequest.CookieContainer = loCookieContainer

This sends a post request to a page by code. On the server side, this is recognized as a post:

            ' If this is a post
            If oRequest.ServerVariables("REQUEST_METHOD") = "POST" Then
                lPost = True
            Else
                lPost = False
            End If

The problem I am facing is to find a way to differenciate between a post from code, such as the above, and a post made by the user on a form from the Web site.

Is there some kind of HttpWebRequest property I could use to initialize and recognize that on the server side where this property would never be received when someone is posting a form on the Web site?