Oh, eeerm, it's the windows equivalent of the libpcap libraries for linux/unix.
They are used for grabbing packets and creating packets (libraries for sniffing network traffic and creating 'raw' packets).
Almost every packet sniffer on windows & unix based operating systems is written using either winpcap or libpcap. (see
here or
here)
It has wrappers for pretty much any language out there, so perhaps it's already possible to *load* the libraries with MHS, but I'm not to sure on how to do that (use libraries from an external package).