title: Visual Studio debug iterators
body: <p>What is the relation between <a href="http://msdn.microsoft.com/en-us/library/aa985896.aspx">_SECURE_SCL</a> and <a href="http://msdn.microsoft.com/en-us/library/aa985939.aspx">_HAS_ITERATOR_DEBUGGING</a>.
  Is it possible to turn on/off range checking and preserve binary compatibility?</p>
  
  <p>Any difference between 2008 and 2010 versions?</p>