Adolf Hitler was not an altar boy.
c) Hitler was a communicant and an altar boy in the Catholic Church.
http://wiki.answers.com/Q/Was_Adolf_Hitler_an_altar_boy
His father’s efforts at Hafeld ended in failure and the family moved to Lambach in 1897. There, Hitler attended a Catholic school located in an 11th-century Benedictine cloister whose walls were engraved in a number of places with crests containing the symbol of the swastika. Impressed by the beauty of the church and accepted by the monks as an altar boy and member of the choir, Hitler dreamt fleetingly of becoming a Benedictine monk.
http://hitlertriumphant.wordpress.com/about/
Adolf Hitler was born on April 20, 1889, at Braunau am Inn, Austria, a small town in Upper Austria, on the border with Germany. He was the fourth of six children of Alois Hitler (1837–1903), a customs official, and Klara Pölzl, Alois’s niece and third wife. Of these six children, only Adolf and his younger sister Paula reached adulthood. Alois Hitler also had a son (Alois Junior) and a daughter (Angela) by his second wife. In Mein Kampf Hitler describes his father as an “irascible tyrant,” although there is little indication that Alois Hitler treated his son more strictly than was usual for that time and place. Adolf’s strict Catholic upbringing was typical for the region. He served as an altar boy and sang in the choir but was not a practicing Catholic as an adult, though in public discourses he continued to frequently claim he was a Christian.[1]
http://www.dittatori.it/hitler-eng.htm