No, there's no code for that, the 170 kb is the size of my whole application (generated exe file), and inside the application there are 8 charts.
If a graphic file is a valid solution for you, and bmp is too big, maybe you can use an image converter to use jpeg. I think it shouldn't be difficult to find a free image converter (maybe in gnu or tucows, free software) that you can call via shell(), i.e. in command line, so you can program the task, without need of copying, paste and convert each time you need it.