VB in Excel

Hello Guys/Gals of Netsmog

A friend of mine whipped up a really cool VB tool in Excel. This tool gives you a question, you answer it, and it scores you. My question is he wants to set his "Check Answer" button to recognize a stroke of the [Enter] key. Meaning, he wants to hit [Enter] and it does the same thing as if he pressed the "Check Answer" button. Any ideas?? I know that in Java you would do something like:

<input type = "button"...>
onKeystrike (enter) "CheckAnswer"

or something like that, since I am rambling on needlessly and obviously don't know what the hell I'm talking about, I'll shut up and leave it to those of you that know this stuff.

Thanks,
Jordan Coffey