You will need to a lot of research before you even consider breeding. It's a costly, challenging and time consuming procedure and not recommended for the beginner fishkeeper.
Have a read through these sites and you'll get an idea:
http://www.theaquariumwiki.com/Breeding_Betta_splendens
http://www.bettatalk.com/breeding_bettas.htm
DON'T just chuck a male and female in together, they'll more likely kill each other than breed.
Also re: eggs, the male cares for them until they hatch, the female has to be removed as soon as the eggs are in the nest (yes the male builds a bubble nest). None of this removing both immediately after (keeping them wet? what? they're laid in water and never leave), that will result in no fry unless you're prepared to dote over the eggs and resulting fry, putting them back in the nest yourself until they're free swimming.