About the sample code

  // TestString.h
  // Copyright (c) 1995 Taligent, Inc.  All rights reserved.
  
  class TSampleObject : public MCollectible {
  public:
      MCollectibleDeclarationsMacro(TSampleObject);
  
                              TSampleObject();
                              TSampleObject(unsigned long maxLength);
                              TSampleObject(const TSampleObject&);
      virtual                 ~TSampleObject();
      TSampleObject&          operator=(const TSampleObject&);
  
      virtual void            SetString(const UniChar* string, unsigned long length);
      virtual void            GetString(UniChar* buffer, unsigned long& bufferlength) const;
      virtual unsigned long    GetLength() const;
      
      virtual void            SetMaxLength(unsigned long);
      virtual unsigned long   GetMaxLength() const;
  
      virtual TStream&        operator>>=(TStream&) const;
      virtual TStream&        operator<<=(TStream&);
  
      virtual bool            IsEqual(const MCollectible*) const;
      virtual long            Hash() const;
  
  protected:
  
  private:
      UniChar*                 fText;
      unsigned long            fLength;
      unsigned long            fMaxLength;
  
      enum EVersion { kOriginalVersion };
  };