Restrict copy and paste of direct URL of the page

Hi all,

I have requirement that user can't open popup (aspx) with direct copy and pasting in url.

i am opening this pop with this code

Dim strScript As String
            strScript = "<script language='javascript'>" & vbCrLf
            strScript &= "window.open('" + strResolvePath + "','POPUP'," & _
            "'height=700,width=900,scrollbars=yes,status=yes,resizable=yes,menubar=no,top=0,screenX=0,screenY=0,left=2,top=2')" & vbCrLf
            strScript &= "</" & "script>"

            HttpContext.Current.Response.Write(strScript)

In this application IsAuthenticate property is always coming false so we can't use this

Request.UrlReferrer property is also coming nothing as this is popup

Here how can we restrict this - unable to find a event that can show that this is direct copy and paste