"B" in FSX is for the Barometric Presure for that altimeter.
Yea I know that, but the Brake Warning was flashing on my screen awhile back when I was taking a screen-shot. Period key didn't work. For some reason I hit the B key and it disappeared. Just a shot in the dark, but it worked. It was kind of weird to see the brake warning while flying. FSX works in mysterious ways sometimes. ;D

Bob