We discuss recent higher order calculations to properties of $B$
mesons. This includes next-to-next-to-leading order corrections to nonleptonic
and next-to-next-to-next-to-leading order corrections to semileptonic $B$
meson decays. The latter is important in connection to the determination of
the CKM matrix element $V_{cb}$. We also discuss next-to-next-to-leading
order corrections to the width difference in the neutral $B$ meson system.

