A newly upgraded version of the BCVEGPY, a generator for hadronic production of the meson   B c        B    c          and its excited states, is available. In comparison with the previous one (Chang et al., 2006), the new version is to apply an improved hit-and-miss technology to generating the un-weighted events much more efficiently under various simulation environments. The codes for production of   2S     2  S       -wave   B c        B    c          states are also given here.
['Chao-Hsi Chang', 'Xian-You Wang', 'Xing-Gang Wu']
BCVEGPY2.2: A Newly Upgraded Version for Hadronic Production of the Meson $B_c$ and Its Excited States