How do I autopopulate field from a link?

My company’s IT department uses Blue Ocean’s TrackIt! 5.0 to manage its helpdesk. Our company is very focused on customer service and so we wan to use a survey page that our users can fill out when a ticket is closed. We created the survey page but we need the page to have the users ticket number to autopopulate the users ticket number when they click a link sent to them via email. Any idea how to do it?