  The most general form of the $WWZ$ and $WW\gamma$ interaction contains a
$CP$-violating term which has the same threshold behaviour as the Standard
Model $\ee \to \ww$ cross section. We calculate the cross section as a function
of the corresponding anomalous coupling, and estimate the bounds which can be
obtained from a measurement of the threshold cross section at LEP2. We show how
the effect of the coupling is most pronounced in the angular distributions of
the final-state fermions.
