If your talking about the little black pi$$ ants, the best thing I've used to get rid of them fast is the Grant's Kills Ants liquid ant bait. It is a blueish liquid and you put a small dime size or less puddle on a non-porous "plate". The ants will have a taste of it and soon there'll be a ring of them sucking the stuff down like pigs around a feeder. They carry the poison back to the nest and feed it to their buddies and soon the whole colony is toast.
If you have the giant black ants that are about 3/4" long, those are Carpenter Ants and they eat the wood framing of your structure. I've not seen an OTC product that is effective against them, so you may have to seek professional help.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.