  We are concerned with the existence and regularity of the solutions to the
Dirichlet problem, for a class of quasilinear elliptic equations driven by a
general differential operator, depending on $(x,u,\nabla u)$, and with a
convective term $f$. The assumptions on the members of the equation are
formulated in terms of Young's functions, therefore we work in the
Orlicz-Sobolev spaces. After establishing some auxiliary properties, that seem
new in our context, we present two existence and two regularity results. We
conclude with several examples.
