Dec 12, 2013 06:32 AM|Angie xu - MSFT|LINK
Is there any way to package multiple application using WIX?
If you want to deploy your asp.net application to IIS, many strategies are available for you, Web Deployment Packages and One-Click Publish, etc, here is a reference for you,
ASP.NET Web Application Project Deployment Overview
If you want to use WIX to deploy multiple applications, I'm not familar with this tool, you can get help from WIX web site(http://wixtoolset.org/), perhaps they can give good solution for you.