title: How to handle "class type redefinition"
body: <p>I've trying to work with an open source VC++ code.
  I'm trying to add a new project to an existing VC++ solution which turned to be a nightmare.
  One of the problems I'm facing is fixing "type redefinition" errors, I already fixed a few but now I'm stuck on some others. The code base is huge so no snippests...</p>
  
  <p>My questions is, is there any "best practice" to track down these errors?</p>
  
  <p>Thanks.</p>