This paper deals with a generalization of the Pompeiu formula for partial differential equation with higher order in thendimensional complex space. In the centre of the investigation lies a construction of a fundamental solution. The problem of constructing such a fundamental solution can be reduced to solving a special initial value problem. This solution will be turned out to be a generalized Riemann-Vekua-function. With the help of the fundamental solution an integral representation for functions being smooth enough can be found. Functions, which are generalizations to higher dimensions of the polyanalytic or polyharmonic functions in the complex plane, can be represented by the boundary values of the function and some of its derivatives.