All network functionality for WIL is performed via "WIL Extenders", add-on Dlls for WIL, which contain Network commands for assorted networks.
NetInfo is the only WIL network function. It returns the types of the networks currently active on the local machine, and can be used to help determine which network extenders should be loaded in multi-network environments.
Documentation for the various network extenders are found in the help file for a particular extender.