  A new Chemo-Dynamical Smoothed Particle Hydrodynamic (CD-SPH) code is
presented. The disk galaxy is described as a multi-fragmented gas and star
system, embedded in a cold dark matter halo with a rigid potential field. The
star formation (SF) process, SNII, SNIa and PN events, and the chemical
enrichment of gas, have all been considered within the framework of the
standard SPH model, which we use to describe the dynamical and chemical
evolution of triaxial disk-like galaxies. It is found that such approach
provides a realistic description of the process of formation, chemical and
dynamical evolution of disk galaxies over a cosmological timescale.
