title: Where can I find the definition of 'SDL_Window'
body: <p>I've just started learning SDL2 in Linux. I am reading the very first tutorial from LazyFoo and I see have that code:</p>
  
  <pre><code>//The window we'll be rendering to 
  SDL_Window* window = NULL;
  </code></pre>
  
  <p>Where can I find the definition of <code>SDL_Window</code> in order to read about it ?</p>