  We study CP violation in $B\to K^* \ell^+\ell^-$ using generalized Dalitz
plot asymmetries in the angular distribution. These new kind of asymmetries are
constructed by adding B and ${\bar B}$ events, and do not require flavor or
time tagging, nor is the presence of strong phases needed. Using this method
one requires about $2 \times 10^8/\eta$ B's to measure the CP violating
parameter $\eta$ in the Standard model. The two--Higgs doublet model requires
only $10^7$ B's to constrain parameters better than done by the electric dipole
moment of the neutron.
