s.look[0] = Blue();

enum {
	ImageLookType = 0,
	ColorLookType	
};

void SerializeLook(Stream &s, Value &v) {
	int type;
	if (s.IsStoring()) {
		if(IsType<Color>(v)) {
			Color c = v;
			type = ColorLookType;
			s % type % c;
		}
		else if(IsType<Image>(v)) {
			type = ImageLookType;
			s % type;
			StringStream png;
			Image img = v;
			PNGEncoder().Save(png, img);
			s % (String)png;
			Point p1 = img.GetHotSpot();
			Point p2 = img.Get2ndSpot();
			s % p1 % p2;
		}
	}
	else {
		s % type; 
		if (type == ImageLookType) {
			String png;
			s % png;
			StringStream str(png);
			Image img = PNGRaster().Load(str);
			ASSERT(!IsNull(img));
			Point p1;
			Point p2;
			s % p1 % p2;
			ImageBuffer ib(img);
			ib.SetHotSpot(p1);
			ib.Set2ndSpot(p2);
			v = (Image)ib;
		}
		else if (type == ColorLookType) {
			Color c;
			s % c;
			ASSERT(!IsNull(c));
			v = c;
		}			
	}
};

void Theme::ButtonStyle::Serialize(Stream& s)
{
	if (s.IsLoading())
		d = Button::StyleNormal(); // Make sure style is initialised
	s % d.cancel % d.exit % d.focusmargin;
	for (int i = 0; i < 4; i++)	{	
		SerializeLook(s, d.look[i]);
	}
}

	int beefin = 0xDEADBEEF;
	int beefout;
	StringStream s;

	PNGEncoder().Save(s, CtrlImg::HelpCursor1());
	s % beefin;

	s.SetLoading();
	s.Seek(0);
	Image img = PNGRaster().Load(s);
	s % beefout;

	ASSERT(!IsNull(img));	
	ASSERT(beefin == beefout);	

Theme m;
LoadFromFile(m, "c:\\test.utheme");
m.Apply(); 

Stream& Stream::operator%(String& s);

s % (String)png;

String s_png = (String)png;
s % s_png;