  One loop contributions to the Higgs boson masses and mixings from the
chargino sector consisting of the chargino, the W, and the charged Higgs boson
($\chi^+-W-H^+$) exchanges and including the effects of large CP violating
phases are computed. It is found that the chargino sector makes a large
contribution to the mixings of the CP even and the CP odd Higgs sectors through
the induced one loop effects and may even dominate the mixing generated by the
stop and the sbottom sectors. Effects of the chargino sector contribution to
the Higgs boson masses are also computed. It is found that the sum of the
$\chi^+-W-H^+$ exchange contribution lowers the lightest Higgs boson mass and
worsens the fine tuning problem implied by the LEP data. Phenomenological
implications of these results are discussed.

High Energy Physics - Phenomenology