  The hadrodynamics of the instantaneous weak interactions (IWI) in Standard
Model is considered supposing the resonance nature of the chiral hadronization
of quark currents in QCD. Exploiting this supposition and QCD symmetries the
IWI mechanism of enhancement of the K+ --> pi+ transition probability is
obtained and relations between electroweak meson form factors and the
amplitudes of the processes K+ --> pi+ e+ e-(mu+ mu-,nu anti-nu) and K+ pi- -->
e+ e-(mu+ mu-, nu anti-nu) are estalished. We estimate possible parameters of
the K+ --> pi+ e+ e- decay rate in NA48/2 CERN experiment using the chiral
perturbation theory.
