C# Signature:

        public extern static int NetUserGetLocalGroups([MarshalAs(UnmanagedType.LPWStr)] string servername,
            [MarshalAs(UnmanagedType.LPWStr)] string username,
            int level,
            int flags,
            out IntPtr bufptr,
            int prefmaxlen,
            out int entriesread,
            out int totalentries);
        [DllImport("Netapi32.dll", SetLastError=true)]    
        public static extern int NetApiBufferFree(IntPtr Buffer);

VB Signature:

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

User-Defined Types:

        [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
            public struct LOCALGROUP_USERS_INFO_0
        {
            public string groupname;
        }

Alternative Managed API:

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Notes:

None.

Tips & Tricks:

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Sample Code:

        public static ArrayList GetUserLocalGroup(string ServerName,string Username, int Flags)
        {
            ArrayList myList = new ArrayList();
            int EntriesRead;
            int TotalEntries;
            IntPtr bufPtr;
            val = NetUserGetLocalGroups(ServerName,Username,0,Flags,out bufPtr,1024,out EntriesRead, out TotalEntries);
            if(val==0)
            {
                _errormsg="Successful";
            }
            else
            {
                _errormsg="Username or computer not found";
            }
            if(Flags>1)
                _errormsg="Flags can only be 0 or 1";
            if(EntriesRead> 0)
            {
                LOCALGROUP_USERS_INFO_0[] RetGroups = new LOCALGROUP_USERS_INFO_0[EntriesRead];
                IntPtr iter = bufPtr;
                for(int i=0; i < EntriesRead; i++)
                {
                    RetGroups[i] = (LOCALGROUP_USERS_INFO_0)Marshal.PtrToStructure(iter, typeof(LOCALGROUP_USERS_INFO_0));
                    iter = (IntPtr)((int)iter + Marshal.SizeOf(typeof(LOCALGROUP_USERS_INFO_0)));
                    myList.Add(RetGroups[i].groupname);
                }
                NetApiBufferFree(bufPtr);
            }
            return myList;
        }

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