how to create Session

Hi All,

I opening the file by using given code

lnlOpenMedicalReport.HRef = "http://www.pravisys/Modules/User/ReceivedFax/" + lnlOpenMedicalReport.InnerHtml;

now iam having one problem,

if i copy the url and paste any where the page will open

now i don't want the open the page , if any body copy and paste the url

please give me any suggestion
...