Need To Run A Code,which Pops Messagebox.show(),on SessionStart Of ASP.NET Appliction

My requirement is to run a code snippet (at WebServer) on session start of an ASP.NET application. The problem is that this code snippet has lots of MessageBox.Show() events, which on being hit show an obvious error:

"It is invalid to show a modal dialog or form when the application is not running in UserInteractive mode. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application"

My problem is that I cant change the code, so i need a work around. Is there a way to run the code, by getting by these Message Alerts, which can keep popping at the WebServer end ??