I have remade RoboWar entirely in C++ (not reviewing the VB source
code). However, I do not of how copyright issues apply.
How should i progress in order to publish the source?
My first idea was that that it should be possible just to upload it
since RW is open source, but it is distributed under some license (I
guess), a topic which I know near to nothing about.
I guess that this situation is different from saying that one has
updated the code, since this is an entirely new project.

- I would be very thankful if I could get an explanation from the
'authority' of RW (if it exists), without references to multi-megabyte
textfiles of copyright laws, explaining how I should do to publish the
code.

The code was originally working but quite unprofessional, so I have
started to make it look more professional. However, 6 months have
progressed since I started and perhaps I will be willing to publish
the source soon in order to allow others to edit.
Most of all, I would like to keep the project to my own site,
http://www.yuide.se. If there are too many complications, I will
probably give the whole thing up or possibly try to use the parts of
the code without influences from RW in making some other game.
// Erik Aas