// Define custom classes of Object type.
class Stack : Object {
  public:
    virtual string GetName() = NULL;
};
class Foo : Stack {
  public:
    string GetName() { return "Foo"; };
    double Weight() { return 0; };
};
class Bar : Stack {
  public:
    string GetName() { return "Bar"; };
    double Weight() { return 1; };
};
class Baz : Stack {
  public:
    string GetName() { return "Baz"; };
    double Weight() { return 2; };
};

int OnInit() {
  // Define and add items.
  Collection *stack = new Collection();
  stack.Add(new Foo);
  stack.Add(new Bar);
  stack.Add(new Baz);
  // Print the lowest and the highest items.
  Print("Lowest: ", ((Stack *)stack.GetLowest()).GetName());
  Print("Highest: ", ((Stack *)stack.GetHighest()).GetName());
  // Print all the items.
  for (uint i = 0; i < stack.GetSize(); i++) {
    Print(i, ": ", ((Stack *)stack.GetByIndex(i)).GetName());
  }
  // Clean up.
  Object::Delete(stack);
  return (INIT_SUCCEEDED);
}