Single sign-on with .ASPXAUTH cookie

From: Andrey Skvortsov (anonymous_at_discussions.microsoft.com)
Date: 06/08/04 

Date: Tue, 8 Jun 2004 03:11:02 -0700

How I can issue web forms authentification cookie that can be used by both applications located on same server(server wide asp.net cookie)?I've one users' domain but asp.net encrypts .ASPXAUTH cookies differently for these two applications.
What can I do with it?