  We describe a code designed for hot media {(T $\ge$} a few 10$^4$ K),
optically thick to Compton scattering. It computes the structure of a
plane-parallel slab of gas in thermal and ionization equilibrium, illuminated
on one side or on both sides by a given spectrum. This code has been presented
in a previous paper (Dumont, Abrassart & Collin 2000), where several aspects
were already discussed. So we focus here mainly on the recent developments.
Presently the code solves the transfer of the continuum with the Accelerated
Lambda Iteration method (ALI) and that of the lines in a two stream Eddington
approximation, without using the local escape probability formalism to
approximate the line transfer. This transfer code is coupled with a Monte Carlo
code which allows to take into account direct and inverse Compton diffusions,
and to compute the spectrum emitted up to MeV energies, in any geometry. The
influence of a few physical parameters is shown, and the importance of the
density and pressure distribution (constant density, pressure equilibrium, or
hydrostatic equilibrium) is stressed. Recent improvements in the treatment of
the atomic data are described, and foreseen developments are mentioned.
