  We applied a recently published modified Fock-Schwinger (MFS) method to find
the exact solution of the propagator equation for a charged vector boson in the
presence of a constant magnetic field directly in the momentum space as a sum
over Landau levels in arbitrary $\xi$-gauge. In contrast to the standard
approaches for finding propagators, MFS method demonstrated several
improvements in terms of computational complexity reduction and revealed simple
internal structures in intermediate and final expressions, thus allowing to
obtain new useful representations of the propagator.
