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Precise measurements of Ds+ and Ds*+ meson production from B mesons and qqbar continuum events near the Upsilon(4S) resonance are presented in this document. Using the BABAR data recorded in 1999 and 2000 of 20.8 fb-1 on-resonance and 2.6 fb-1
off-resonance, the inclusive branching fractions of Ds(*)+ mesons from B decays have been measured. The branching fractions Sum(BR(B → Ds(*)+ D(*))) and Sum(BR(B → Ds*+ D(*))) have been determined from the fit of the measured Ds(*)+ momentum
spectra.
The study of different fragmentation functions and production cross sections measurement were done for the Ds(*)+ momentum spectrum produced from qqbar continuum events.
Employing a partial reconstruction technique, the branching fractions of the B0 → Ds(*)+D*- decays have been determined. From the angular analysis of B0 → Ds*+D*-mode the fraction of longitudinal polarization is determined.
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