How do you determine if a WiX installer is quiet or interactive?

Question

Is there a way within WiX to determine if the installer is being run in quiet mode or interactively?

Answer 1

My google-fu finally kicked in. Apparently there are some built-in properties that you can use to determine the UI level.

http://msdn.microsoft.com/en-us/library/aa372096%28VS.85%29.aspx