[DllImport("iphlpapi.dll", EntryPoint="GetIpNetTable")]

static extern int GetIpNetTable(IntPtr pIpNetTable, ref int pdwSize, bool bOrder);

    Private Shared Function GetIpNetTable(pIpNetTable As IntPtr, <MarshalAs(UnmanagedType.U4)> ByRef pdwSize As Integer, bOrder As Boolean) As <MarshalAs(UnmanagedType.U4)> Integer

    namespace GetIpNetTable

          // Declare the GetIpNetTable function.

          static extern int GetIpNetTable(

         int result = GetIpNetTable(IntPtr.Zero, ref bytesNeeded, false);

            result = GetIpNetTable(buffer, ref bytesNeeded, false);

    Dim result As Integer = GetIpNetTable(IntPtr.Zero, bytesNeeded, False)

        result = GetIpNetTable(buffer, bytesNeeded, False)

        /// if the pdwSize parameter is NULL, or GetIpNetTable is unable to write

        /// The GetIpNetTable function retrieves the IP-to-physical address mapping table.

        [DllImport("Iphlpapi.dll", EntryPoint="GetIpNetTable")]

        private static extern int GetIpNetTable(IntPtr pIpNetTable, ref int pdwSize, bool bOrder);