How to order the PGC (Film, Extra, Menu, ...) ?

[DomZZZZ]

Hi,

I have made an DVD IFO parser in vb.net.

I can retrieve most of the information about PGC, but i would like to do like some other DVDripper software and sort the PGC into categories (film, extra, menu, unknown).

But I don't know how to do that ?

Can someone help me ?

Thanks