title: How frameworks like Qt create GUI, if C++ has no functionality for that?
body: <p>From the answers recieved for the question here: <a href="https://stackoverflow.com/questions/15611024/graphics-using-standard-c-only">Graphics using Standard C++ only?</a></p>
  
  <p>Seems to be that C++ itself does not have GUI functionality. So how do other Frameworks like Qt which support GUI in C++ do that? Do they use some other language internally or is there some other standard lobrary/protocol for GUI?</p>
  
  <p>And I am concerned about the C++ language frameworks only.</p>
  
  <p>Thank You.</p>