How to process lines from two buffers and add info to a new buffer?

[Bamsen]

Hi,

I have two buffers open and I want to read lines from them (get_line) and do some processing and then add lines to a new third buffer (insert_line).
The problem is, I can not find the command to switch buffers, to make get_line read where it should.
Also I need the command to create a new buffer that I can write the result to.

If you could please provide me with the relevant commands, and maybe point to a document where I would have been able to find commands I need, I would be very happy.

Thanks,
Morten

[hs2]

I think just edit could be fine. Regarding a 'third buffer' it depends.
Do you want to create a new file (edit) or do you need a temp. buffer (_create_temp_view) ?
Good luck, HS2

[Bamsen]

I seem to be able to do this with _next_window() and load_files("+i +t")