class Component
{
public:
  void Init( void ) = 0;
  void Update( float dt ) = 0;
  void ShutDown( void ) = 0;
  void SendMSG( MSG *msg ) = 0;

protected:
  CID id; // Component id
  GameObject *m_owner;
  bool m_active; // delayed destruction
}

class GameObject
{
public:
  void SendMSG( MSG *msg ); // forward msgs to all components;
  Component *GetComponent( CID id ); // Can do binary search with std::map on CID
  void Update( float dt ); // Run update on all components
  void AddComponent( Component *comp );

private:
  std::map<Component *, CID> m_componentMap;
};

// Adding components, all default constructed with initial values
GameObject *obj = Factory->CreateObject( );
obj->AddComponent( Factory->CreateComponent( "Tansform" );
obj->AddComponent( Factory->CreateComponent( "Sprite" );
obj->AddComponent( Factory->CreateComponent( "RigidBody" );

Component *sprite = obj->GetComponent( Spriteid );
sprite->Update( ); // render an object