title: fstream and ostrstream is undefined
body: <p>HI,</p>
  
  <p>I am converting my project from vc6 to latest using vs 2010. I get problem on compiling my code </p>
  
  <p>Error   931 error C2065: 'ostrstream' : undeclared identifier
  1100    IntelliSense: identifier "fstream" is undefined</p>
  
  <p>I have included the required files as told in Google</p>
  
  <pre><code>#if ! defined(_FSTREAM_)
      #include &lt;fstream&gt; 
  #endif 
  
  #if ! defined(_STRSTREAM_)      
     #include &lt;strstream&gt;      
  #endif 
  </code></pre>
  
  <p>When i press F12 on the fstream or ostrstream it takes to the respective files where these class are defined. Is there any other includes i have to do, i have been searching for this for long time with no luck :(</p>
  
  <p>Thanks</p>
  
  <p>Arvind</p>