title: ncurses "shadow" of a window
body: <p>I'm learning ncurses and I ran into a "problem". I can make a window with text in it, I can change the color of the window, and the color of the background(stdscr). My problem is, that I can't make the shadow of the window (black ACS_BLOCKs). I tried the <code>border()/wborder()</code> functions, but it didn't do what I expect. So I want something like this:</p>
  
  <p><img src="https://i.stack.imgur.com/b5yub.jpg" alt="the Shadow is looking at you"></p>