Well I guess there are no .NET developers here huh
I figured it out. They actually MAP the keys to the numbers whenever you focus on one of those fields. Kind of funny actually because this would have to be changed for any Pocket PC with a keypad. You can tell by editing a contact and using the SIP (soft input panel/on-screen keyboard) to enter the numbers by tapping on the E R T D F G X C V keys on the screen. The numbers are entered instead. I now have this same behavior in my app