  Calculations of the thermodynamical properties of a supercooled liquid
confined in a matrix are performed with an inherent structure analysis. The
liquid entropy is computed by means of a thermodynamical integration procedure.
The contributions to the free energy of the liquid can be decoupled also in
confinement in the configurational and the vibrational part. We show that the
vibrational entropy can be calculated in the harmonic approximation as in the
bulk case. The Kauzmann temperature of the confined system is estimated from
the behavior of the configurational entropy.
