title: wchar_t is unsigned or signed
body: <p>In this <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/dd374131.aspx" rel="noreferrer">link</a> <code>unsigned wchar_t</code> is <code>typedef</code>ed as <code>WCHAR</code>. But I cant find this kind of typedef in my SDK <code>winnt.h</code> or mingw <code>winnt.h</code>.</p>
  
  <p><code>wchar_t</code> is signed or unsigned?</p>
  
  <p>I am using WINAPIs in C language. </p>