>On a reports form, I have an option group w/four buttons labeled Preview, Print, File and eMail respectively. If the user selects eMail, the fourth button, and a particular printer driver is not found I warn the user and want to enable Preview, the first button option.
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>In the click method of the eMail or fourth option, after performing the driver check and messageboxing the user, I set the value of the option group = 1. and the fourth dark dot immediately lightens, but the first does not darken and the fourth label remains highlited with the dotted box. If I tab thru the controls back to the option group the Preview label, the first option, becomes highlited, but no option button is darkened. What is going on?
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>Also, as an aside, what determines whether the option value is numeric or character?

Al little off problem, but why not perform your check as the form starts and disable the option so the user isn't presented with an option that cannot select.