One Question

[Yen-Ju Chen]

  I met a strange question.
  I design a Delegate class as the delegate of NSApplication,
  and this Delegate will create one or more Window class to show up the
window.
  Then if Window class has a method, Black,
  and the Delegate want to use this Black method,
  I write this code in Delegate class:

 - (void) Red {

  Window *myWin = [NSApp keyWindow];
  [myWin Black];

  NSLog (@"Red");

}

  When no Window created, the program just shows "Red", which is expected.
  When I create the Window, the program has a error:
  NSWindow can't recognize Black.
  Is it right ?

  I set one menu to use the Red method, action: @selector(Red);
  but I don't think it matters.

  So how could I call Black in Window from Delegate ?

  PS. Delegate is inherited from NSObject,
  and Window from NSWindow.

  Thanx a lot!!