  We give a brief review of direct $CP$ violation effects in charmless $B$
decays, both at the inclusive and at the exclusive level. It is emphasized that
typical exclusive final states are composed of 2--4 $K$ or $\pi$'s, hence
particle identification (in terms of $K/\pi$ separation) is of crucial
importance for studying $CP$ violation in these modes. Another kind of
``charmless" final state is also emphasized: $b\to dc\bar c$. The decay rate is
tree dominant, while ``$q^2$" is necessarily above $c\bar c$ threshold hence in
the domain of perturbative QCD. The $CP$ asymmetry is therefore relatively
clean and reliable. Theoretically, a few $\times 10^7$ $B$'s would suffice if
one could accumulate modes like $B^+\to D^{+\left(*\right)} \bar
D^{0\left(*\right)}$. [To appear in proceedings of ``The Third KEK Topical
Conference on
  CP Violation --- Its Implications to Particle Physics and Cosmology'',
  16--18 November, 1993, KEK, Tsukuba, Japan (Eds. Y. Kuno and Y. Okada).]
