From: EdUarDo <eduardo.yanezNOSPAM@...>
Date: 2005-07-23T00:50:56+09:00
Subject: Abstract class or interface?

Hi all again :),

How could I implement this model?

Window <>--------------------- Button
                                  ^
                                  |
                                  |
                          -----------------
                          |               |
                       BigButton      LittleButton


Being 'Button' an abstract class or an interface.
I mean, how do I define an interface? Must I use modules?