  The moduli spaces of Calabi--Yau (CY) manifolds are the special K\"ahler
manifolds. The special K\"ahler geometry determines the low-energy effective
theory which arises in Superstring theory after the compactification on a CY
manifold. For the cases, where the CY manifold is given as a hypersurface in
the weighted projective space, a new procedure for computing the K\"ahler
potential of the moduli space has been proposed in \cite {AKBA1,AKBA2, AKBA3}.
The method is based on the fact that the moduli space of CY manifolds is a
marginal subspace of the Frobenius manifold which arises on the deformation
space of the corresponding Landau--Ginzburg superpotential. I review this
approach and demonstrate its efficiency by computing the Special geometry of
the 101-dimensional moduli space of the quintic threefold around the orbifold
point \cite {AKBA3}.
