>Thanks to the helpful replies. To this one I have got to say "are you kidding"? I hardly think that using a yes or no option would throw any users, no matter how experienced with windows UI, into any kind of mass confusion. I think the learning curve for a control that is simply yes or no would be completely flat. I was simply trying to get around the idea that some users would have a problem answering a question with NO by not checking a yes box. It is so much clearer if they could actually check YES or NO. I could see how they could feel it was simply unanswered if they didn't check anything.
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A combobox would be a better choice than an option group. However, I agree with Erik here.


>However I am sticking to the checkbox simply because it is 'packaged' that way and it will be easier to maintain.
>But I do appreciate the good suggestions I got and I believe I will make use of them, may even change this app as time permits. But since this is the real world and I need to get this thing finished, it will be checkboxes for now.