title: - (void) keyDown: (NSEvent *) event does not work
body: <p>Below is the sample code. </p>
  
  <pre><code>- (void) keyDown: (NSEvent *) event
  {
      NSString *chars = [event characters];
      unichar character = [chars characterAtIndex: 0];
  
      if (character == 27) {
          NSLog (@"ESCAPE!");
      }
  } 
  </code></pre>
  
  <p>Should I need to set any delegate in InterfaceBuilder or any kinda binding?? </p>
  
  <p>Help Appreciated...</p>