This command will set the velocity of the specified object along the X and Y axis. This can provide an easy way to make a character walk across the floor, or fly into the air. Unless you continually set the velocity, the body's velocity will slowly decrease and it will eventually come to a stop. The ID should be the integer handle that was returned when the body was created.
Syntax
b2SetBodyLinearVelocity ID as Integer, X as Float, Y as
Float