Elements of the quantization in field theory based on the covariant
polymomentum Hamiltonian formalism (the De Donder-Weyl theory), a possibility
of which was originally discussed in 1934 by Born and Weyl, are developed. The
approach is based on a recently proposed graded Poisson bracket on differential
forms in field theory (see e.g. hep-th/9709229). A covariant analogue of the
Schr\"odinger equation for a hypercomplex wave function on the space of field
and space-time variables is put forward. It is shown to lead to the De
Donder-Weyl Hamilton-Jacobi equations in quasiclassical limit. A possible
relation to the functional Schr\"odinger picture in quantum field theory is
outlined.