Paper: First EVN Maps of 6-GHz OH Lines in Star Forming Regions Volume: 144, Radio Emission from Galactic and Extragalactic Compact Sources, IAU Colloquium 164 Page: 371 Authors: Desmurs, J.-F.; Baudry, A. Abstract: We have used 3 antennas of the EVN to observe in 6 star-forming regions simultaneously, and for the first time, the 2 main lines of the J=$5\over 2$ state of OH with right and left circularly polarized feeds. Maser features and Zeeman pairs are identified by searching for emission over adjacent channels, and adjacent positions (within one synthesized beam) in both polarizations after we had mapped and used one selected simple channel as a reference. The magnetic field strength is thus estimated from the Zeeman pairs identified in our OH maps. We briefly present results obtained for W3(OH), ON1, and W51.