upper case default in comment box

Is it possible to have the text format in a comment box to automatically be
uppercase?

Thanks in advance for any help

regards
John

UCase Function

Returns a Variant (String) containing the specified string, converted
to uppercase.

Syntax

UCase(string)

The required string argument is any valid string expression. If string
contains Null, Null is returned.

Remarks

Only lowercase letters are converted to uppercase; all uppercase
letters and nonletter characters remain unchanged.

hope this helps