Classes

     (object-oriented) A class defines the variables contained in an object,
     and the operations applied when the object receives a message.  Every
     object is an instance of a class and responds to messages of that class.
     Each object, however, has its own copy of the variables specified in the
     class definition.  New objects are created in CA-Clipper by a calling a
     special function that begins with the class name followed by the New
     suffix.