Bit Blit sections

Does anyone know where I can find a good example of how to create a memory dc containing multiple sprites and then blit just one section of it at a time?

I have a program that does this but the code is not documented and its too complecated for me to get much out of it.

Well its not very difficult.
You just create your memory DC, then BitBlt from different areas of that device context. Those specific areas would be the different images in the DC