  The signature of the self-microlensing in compact binaries (white dwarfs,
neutron stars and black holes) is a flare with the characteristic time of
typically a few minutes. The probability of detecting these microlensing events
can be as high as $1/50$ for a flux sensitivity of $\Delta m=0.01$ in
magnitude. The discovery of the self-microlensing by binaries would furnish an
additional way to find the masses of the lens and the companion and will be
promising for the searches of black holes.
