title: This function or variable may be unsafe visual studio
body: <p>I got a problem on visual studio. 
  I try to use the localtime function from "time.h".</p>
  
  <p>Visual studio tells me it's an unsafe function. However, I have tu use this one for my school exercice. I saw that you can disable this unsafe error by going in the project properties, build tab, and check "enable unsafe code".</p>
  
  <p>Nevertheless, I don't have a build tab, as you can see there : 
  <a href="http://puu.sh/4NkYC.png" rel="noreferrer">http://puu.sh/4NkYC.png</a></p>
  
  <p>I'm using windows 7 and visual studio 2012 Ultimate. It looks like the "build tab" and "enable unsafe code" has vanished :/
  Maybe you know how to fix that ? </p>
  
  <p>thank's a lot :)</p>