>Yeah, that was one thing that I thought about after seeing your code. It's always been done by checking the ascii range and changing to the uppercase range, if necessary. But ISALPHA just seems a little better. I just don't think about this function because I don't find much use for it. I don't have to worry about non-English characters, but still the ISALPHA solutions seems to have a slight edge over the old tried and true method.

The old tried and found false method. Even the famous InGrid class has this error. Checking with isalpha() actually works for other codepages.
Of course one still has to check the keypress value for negative values - so I think it'd be

case between(nKey, 32, 255) and isalpha(chr(nKey))