Was the messerschmitt used in World War 1?

Messerschmitt was founded in 1938, just the year before WW2 began.
During WW1 Messerschmitt worked on Friedrich Harth's gliders, but these did not see use in the war. In 1917 Messerschmitt voluntarily enlisted in the German army and served until the end of the war, after which he returned to glider research.