How to detect a multi-volumes if is the first volume

[zhspy]

Hi,thanks for providing such a nice library.I'm creating a app to extract bundles of compressed file(by searching files in directory).When dealing multi-volumes files,Is there anyway to detect a file if it is the first volume(except using do regext to the filename)? So I can ignore the other file to prevent raising exception.Sorry for poor English.Thanks again.

[zhspy]

I found the "volume index" in properties,problem solved.Thanks for the library again.