title: warning C4819: How to find the character that has to be saved in unicode?
body: <p>I have seen the following warning recently through my VS2010.</p>
  
  <p>Warning 21  warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss    </p>
  
  <pre><code>c:\boost\vs2010_boost1.49\include\boost\format\alt_sstream_impl.hpp 1
  </code></pre>
  
  <p>Based on <a href="http://msdn.microsoft.com/en-us/library/ms173715.aspx" rel="noreferrer">MSDN</a>, the file contains a character that has to be saved in unicode format.</p>
  
  <p>Question: I didn't touch those files myself. Is there a way that I can find those characters and correct it manually. In other words, I don't want to save the source file in unicode format.</p>
  
  <p>Thank you</p>