title: Fullscreen vs Borderless window
body: <p>My goal is to create an OpenGL application. I've seen many games that let the user decide if the "game window" will be "fullscreen" or "borderless". What's the difference? How do I implement each method?</p>
  
  <p>I heard that fullscreen windows are just windows with WS_POPUP style that are set to be the width and height of the screen. Is this true for only one of the approaches I mentioned above?</p>
  
  <p>What's the difference between "Borderless" and "Fullscreen" here? (screenshot taken from LoL)
  <a href="https://i.stack.imgur.com/ltR7M.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ltR7M.png" alt="img"></a></p>