Change Case In Visual Basics

Hello

I was hoping someone might be able to help me.

I have an Excel 2003 document that I am working with. It requires entries of one or two letters per cell. I would like to have all the letters in a range of cells to automatically change to uppercase reguardless of how it is entered.

I am quite a novice when it comes to Visual Basics and I appreciate any help. I have been looking everywhere and cannot seem to make heads or tails of the information I have found. I would appreciate any help.

Attached is an example page of the code I have written thus far.