title: What is the WiX equivilent of Environment.SpecialFolder.ApplicationData from .NET?
body: <p>I need to install a file into the <code>Environment.SpecialFolder.ApplicationData</code> folder, which differs between XP and Vista. Is there a built in way to reference the correct folder in WiX or will I have to use conditional checks for OS and do it manually?</p>
  
  <p>If I have to do the latter, how do I reference the current windows user's directory in Vista?</p>