title: Is there a difference between <winsock.h> and <winsock2.h>?
body: <p>I'm including  as it's required by the MySQL C library.</p>
  
  <p>The auto-complete in VS2010 is also showing a  - any idea what this is?</p>
  
  <p>Are they interchangeable, and are there any advantages of one over the other?</p>
  
  <p>Thanks!</p>