V5 moves when not using joystick

Tommorow is our first tourney with V5. We have found that when we are not touching the joystick the bot still moves very slowly. I have calibrated the controller. I need to make a statement that if the joystick value is between 10 and -10, the motors break. How do I do this?

How, in VCS C++ do I make an if statement with 2 conditions?