title: what is full screen mode
body: <p>I know you can fake full screen by expanding a window and eliminating the title bar , status bar , and other stuff, I'm not interested in this, I want to know about "real" full screen mode (I don't know how to call it else) , like in games.</p>
  
  <p>what exactly is full screen mode?
  what win-api should I use to achieve this?
  can this be used to play movies in full screen ? I know windows media player uses a fake full screen because I can "cut" thru it and see the desktop (using regions win-api).
  can I "cut" thru "real" full screen like I thru a window  (using regions win-api) ore is this directly writing to video memory and there is nothing "under" it?</p>
  
  <p>Thanks!</p>