Wow. Turns out this thing might be useful to more than just me. Anyway, I've added P/Invoke calls to allow access to the WinPCap functions that are specific to Windows as well as the packet filtering functions. I've added a port of the packet filtering example as well. I can't say I've tested all the calls yet, regardless, at this point I am going to start moving up to a higher level. I think we should now have access to almost all the calls available in the native WinPCap, but feel free to leave...