Prevent moving to next record when hitting Enter?

I have a form in Access 2003 that should only be working with a single record. I can set the Cycle property to Current Record, but the form still jumps to the next record when I press Enter. My first thought was a KeyPreview property, but I'm not seeing one. My other thought is maybe the KeyPress or KeyUp event, but I thought I'd ask in case of unintended consequences. Any ideas?