[en] The specific features of massless and massive N=2 super-Yang-Mills theories are studied. In the frame of the harmonic superspace formalism, the component from of the superstrength and free Lagrangian of the vector multiplet will be found without fixing a concrete supergauge for the Abelian case. Starting with the Abelian superstrength, find the form of the non-Abelian superstrength in the first order of the coupling constant g, not fixing the supergauge. Abelian superstrength in the first order of the coupling constant g, not fixing the supergauge. In conclusion the approach analogous to the Stueckelberg method, to obtain the component Lagrangian of the massive N=2 Yang-Mills theory in the first order of the couplig constant g. 7 refs