title: NSWindowController and NSViewController
body: <p>Probably a pretty simple question, but I can't get my head around it.</p>
  
  <p>I would like to create some sort of wizard: An <code>NSWindow</code> appears as a sheet from another <code>NSWindow</code> and should show three different <code>NSView</code>s one after another.</p>
  
  <p>I think I should create a custom <code>NSWindowController</code> and three <code>NSViewController</code>s but I don't know how to how to set up the controllers and how to exchange the views.</p>