title: What is Header Search Path in Xcode 4.3? How to use it?
body: <p>I want to add one existing project into my new project. I have added if using "Add files to "Project".
  When I'm going to import it's <code>.h</code> file in my new <code>.h</code> file. It say file not found.
  I have tried to add Path for Header file in Header Search Path in Search Path. But I don't know how.</p>
  
  <ul>
  <li>Which path I have to add in Header Search Path? </li>
  <li>And What is Recursion in Header Search Path?</li>
  </ul>