This page is a modified copy/paste from the NetLocalGroupEnum.

internal extern static int NetLocalGroupEnum([MarshalAs(UnmanagedType.LPWStr)]

Declare Function NetLocalGroupEnum Lib "netapi32.dll" (TODO) As TODO

                err= NativeMethods.NetLocalGroupEnum(

        internal extern static int NetLocalGroupEnum(

                res = NetLocalGroupEnum(serverName, level, out buffer, MAX_PREFERRED_LENGTH,

Code to read the membership of Local Groups (ideally used with NetLocalGroupEnum )