>>txtPhone.Format = 'RT'
>>If the data is filled in programatically, it works fine. However, if
>>it isn't, or if I blank out the data, I can't type into the field.
>>What incredibly obvious thing am I missing this time?
>I guess, it works Ok with Format="R"?

Yes, it works just fine. Is this documented somewhere, or is it a "try it until
you get it right" type of thing? I checked the MSKB first, but came up dry...