To get any images search for the He 100D, which was it,s correct designation. I've pulled a couple up for you below.
link
wp.scn.ru/en/ww15/f/430/2/1
As for how it performed against allied aircraft it didn't. As the Wiki entry posted by Major Mike states they produced only about twenty He 100's, including prototypes, which were only used for propaganda purposes and as a local defense squadron for the Heinkel facility.
However both Japan and, unbelievably, the Soviet Union took serious steps towards producing the type and Rumania, which was the major user of the He 112, was very interested as well. All of which is serious what if fodder.
Fatman
Oh and as the Heinkel had a much better endurance than the Bf 109E if the Luftwaffe had got some in 1940 it would have made things that much more difficult for fighter command.
