  We study one-loop effects of charginos and neutralinos on the helicity
amplitudes for the process $e^+e^-\to W^+W^-$ in the MSSM. The calculation is
tested by using two methods. First, the sum rules among form factors which
result from BRS invariance. Second, the decoupling property in the large mass
limit is used to test the overall normalization of the amplitudes. The one-loop
contribution to the helicity amplitudes is shown as a function of $\mu$ Higgs
parameter and $\sqrt{s}$. We also study the effects of the CP-violating phase.
