Hey guys. Is there anything in the code of a gif that can tell me (or my app) that it is animated?

I want to delete all gifs that are not animated.

FOr example


for x = 1 to (number of gifs)
if gif(x) (is not an ANIMATED gif) Then Kill (gif(x))
NEXT X

I havent found anything in the readible text of the file, but maybe it's part of the other info.

Any ideas?
Thanks.

Wengang