  We outline a comprehensive study of spin-0 glueball properties which, in
particular, keeps track of the topological gluon structure. Specifically, we
implement (semi-hard) topological instanton physics as well as topological
charge screening in the QCD vacuum into the operator product expansion (OPE) of
the glueball correlators. A realistic instanton size distribution and the
(gauge-invariant) renormalization of the instanton contributions are also
implemented. Predictions for 0^{++} and 0^{-+} glueball properties are
presented.
