Standard superfields in the harmonic formalism of supergauge theories

Connection between the standard superfield formalism and the harmonic superspace method is studied in the 6-dimensional and extended 4-dimensional supergauge theories. The action of the abelian theory is expressed in terms of the real prepotential $V_{ik}$. О generalization for the non-abelian case can be performed with the help of the iterative method. Analysing the supergauge theory with the gauge group $SU(2)$ the authors exploit the exact solution of the equations for the harmonic superfield connections which can be expressed in terms of the real prepotential $V_{iklm}$ in a special gauge.