Hi, Deb! We put up some corn last week, and there's only one way that *I* know of to do it-kettle blanch and cool. We always cut the corn off the cob, but I know some people freeze the whole ear. I've never canned corn, we always freeze it.
I don't think the microwave would be suitable for that, because it's not even heat. Microwaves heat some spots hotter than others. Also, I probably wouldn't use it anyway, because of the research my daughter told me about with microwaves. The micowaves alter the food in unhealthy ways. SHe won't even use a microwave anymore! SHe'd rather dirty a pan or eat her leftovers cold. I don't go that far, but I don't think I'll be looking for new ways to use it. I never found actually cooking with it to be very convenent, anyway. In any case, I don't think it would be suitable for putting food up. :)