VS 2010 Disable The Capslock Key?

I Just finished a very nice Excel database front end, using mostly code snippets and tutorials learned from this site, I am new to .net and OOP having only ever trained in VB6, many many years ago and working only with VBA since then, and now I'd like to add a little extra polish to my humble app, so I need some expert help.

The problem really lies with one user in particular, who insists on typing with the capslock on when using my application, filling the database with odd records of only uppercase, when challenged she protests she isn't computer savvy and finds capitals quicker and easier.

I am aware of the string conversion tricks (ToUpper/ToLower/ToProper) available, however, due to the nature of the information being entered, it needs to be true mixed case, certain information might contain for example brand names, which often have uppercase/lowercase letters which vb or Excel for that matter simply cannot pragmatically account for (McDonalds is a good example, neither upper, lower or 'proper' as defined by the rules)

And so to my cunning plan, it is my desire to disable the capslock key! I am already setting a set of rules for each user based on Environment.UserName and so I am hoping just for this one user I can switch off the ability to use caps, as everyone else behaves themselves. I have tried to code me own way down this path but as yet have failed on all accounts.