You could use data validation to ensure that the end user enters the data in
the cell in uppercase.
To do this, select the cell, click Data / Validation and choose "Custom"
from the list. Assuming the cell is A1, enter the following validation
formula:
=EXACT(A1,UPPER(A1))
To apply this data validation to other cells, copy A1 and click Edit / Paste
Special / Validation to the cell / range to which you'd like to apply it.
If that's not what you're looking for, you can use another column to format
the data as uppercase. For example, if A1:A10 is your data input range, set
B1 to:
=UPPER(A1)
and fill down to B10.
Another option is to use macros to automatically set the values you enter to
uppercase. If that's something you'd consider, I suggest posting to
microsoft.public.excel.programming.
/i.