You can use the After Update event of a control on a form like:
Me.txtYourTextBox = UCase(Me.txtYourTextBox)
For more immediate UCaseing, you could use the KeyPress event to upper case
the keystroke.
If you had a lot of these to program, you might try to make this more
generic.
I hate all caps.... :-(

Signature
Duane Hookom
MS Access MVP
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> Hello,
>
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>
> Alvin.