Just cut the small end to the top, trim the big end, soak in the husk for a min of 30 min, 1 hr is better. The husk soaks up the water and won't burn and steams the corn as it cooks. As you are grilling other food keep them on the grill turning occassionally. Cook for approx 15-20 minutesHow do I bar b que corn onna cob? It's still in the husk.
Soak the corn, husk and all, for a little bit.
Put them on the BBQ and grill. When the husk starts to blacken, turn them. When its evenly dark they are done.
Simple as simple gets. not sure what all the talk above is all about but thats how I do it.