title: Where is '$OutDir' defined in the script file in Visual Studio?
body: <p>There are bunch of macros that Visual Studio uses in project settings which are listed <a href="http://msdn.microsoft.com/en-us/library/c02as0cs%28v=vs.100%29.aspx" rel="noreferrer">here</a>. I am unable to locate where are these macros or identifiers defined in the actual script file (not in project settings).</p>
  
  <p>In my case I am trying to change the output folder for a project to that of the solution debug or release folder (one level up) but changing 'Output Directory' in project settings has no effect.</p>
  
  <p>There is no mention of these macros in .vcxproj file either so I really don't know where they defined? I am most interested in the <code>$(OutDir)</code> that I want to change to solution debug/release folder. Does anyone knows where these are defined?</p>