internal static extern void NewtonBallSetUserCallback(IntPtr pNewtonBall, NewtonBall pCallback);
internal static extern void NewtonBallSetUserCallback(IntPtr pNewtonBall, NewtonBall pCallback);
internal static extern void NewtonBallSetUserCallback(IntPtr pNewtonBall, NewtonBall pCallback);
internal static extern void NewtonBallSetUserCallback(IntPtr pNewtonBall, NewtonBall pCallback);