NetworkEnumNetwork enumerates networks accessible to the workstation.

#include <nwiapi.h>

ULONG     ulLevel;
PVOID     pBuf;
ULONG     cbBuf;
PULONG    pcReturned;
PULONG    pcTotal;
PULONG    pcbNeeded;
PVOID     pReserved;
ULONG     ulreturns;

ulreturns = NetworkEnumNetwork(ulLevel, pBuf,
              cbBuf, pcReturned, pcTotal,
              pcbNeeded, pReserved);