  This paper presents the final interpretation of the results from DELPHI on
the searches for Higgs bosons in the Minimal Supersymmetric extension of the
Standard Model (MSSM). A few representative scenarios are considered, that
include CP conservation and explicit CP violation in the Higgs sector. The
experimental results encompass the searches for neutral Higgs bosons at LEP1
and LEP2 in final states as expected in the MSSM, as well as LEP2 searches for
charged Higgs bosons and for neutral Higgs bosons decaying into hadrons
independent of the quark flavour. The data reveal no significant excess with
respect to background expectations. The results are translated into excluded
regions of the parameter space in the various scenarios. In the CP-conserving
case, these lead to limits on the masses of the lightest scalar and
pseudoscalar Higgs bosons, h and A, and on tan(beta). The dependence of these
limits on the top quark mass is discussed. Allowing for CP violation reduces
the experimental sensitivity to Higgs bosons. It is shown that this effect
depends strongly on the values of the parameters responsible for CP violation
in the Higgs sector.
