  The ALICE experiment at the LHC was taking data in proton-proton collisions
at the center-of-mass energy of 7 TeV starting from March till the end of
October 2010. First heavy-ion collisions were delivered during November 2010.
Among other particles, charmed and beauty mesons can be reconstructed by the
ALICE apparatus. Open heavy flavour mesons provide a powerful tool to study hot
quark matter produced in high energy heavy-ion collisions because their spectra
are expected to be affected by energy loss in the medium. Measuring such
particles is important also in proton-proton collisions. In this case they
provide a necessary reference for heavy-ion collisions and allow to test pQCD
predictions in a new energy domain. Different ways to reconstruct D and B
mesons are described together with adopted selection and analysis techniques. D
mesons in the central rapidity region are reconstructed via 2,3, and 4-prongs
hadronic decays and via single electrons. In the forward region, semi-muonic
decays are used to measure the production of D and B mesons. The first results
for D mesons, single electrons and single muons are reported.
