Reed Messe Wien
The Congress Center can easily be reached via Vienna's excellent public transport system. Take metro/subway LIne U2 and disembark at "Messe-Prater", take the exit marked "Messe" and walk straight ahead, past the exhibition center. You can enter the congress center at the "Messeturm" (see map below).
There is a taxi stand right in front of the congress center and parking is available in close proximity.