how
      to construct a Cocoa application using nibfiles created with
      InterfaceBuilder, see the "currency-converter" example.</p>

    <div class="title">
      <h2>Creating a Window</h2>
    </div>

    <p>Every user-interface element under Mac OS X appears either in
    a window or in a menu. We'll begin by exploring how to create and
    display windows.</p>

    <p>First, switch to the <code>CCL</code> package, for
    convenience. Most of Clozure CL's Objective-C utilities are in
    the <code>C