vim linebreak after hyphen with gq

Question

Hi,

Is there some way to configure vim's gq function so that it allows line breaking after a hyphen (in a compound word)? e.g.

twentieth-
century

And by the way, I'm not on my own laptop, but on one of the lab, which runs Windows, so any solution not using programs like par or fmt get bonus points :-) (though I'm also interested in solutions using these tools if this is not possible to do this using only vim -- at least I would be able to do it on my laptop).

Thanks in advance.