Career
Early in his career, Kox worked as an assistant for Dino Attanasio. In 1970 began publishing Vladimir et Firmin (Vladimir and Firmin), a series of one-page strips about a forest ranger and a poacher which appeared in the Belgian comics monthly magazine Samedi-Jeunesse and in 1974, started working with Spirou magazine. In 1975, Kox and writer Raoul Cauvin created Agent 212, a humorous about a somewhat gaffe-prone policeman.
This very successful series remains Kox" best known work and twenty eight volumes have been published by Dupuis since 1981.