No Case-Sensitive Searches in Windows Vista?

For the life of me, I cannot find a way to do a case-sensitive search in Windows Vista.

I am trying to search the documents on my computer that contain a specific word, let's say "Foo". It shows me all documents that contain the word "Foo", "foo", "FoO", etc.

That is fine in and of itself, but there should be an option somewhere in Vista to say "No, only give me 'Foo' and nothing else".

Alas, I cannot find such an option.

Anyone?