[DllImport("Wlanapi", EntryPoint = "WlanFreeMemory")]

        public static extern void WlanFreeMemory([In] IntPtr pMemory);

     <DllImport("Wlanapi", EntryPoint := "WlanFreeMemory")> _

     Public Shared Sub WlanFreeMemory(<[In]> ByVal pMemory As IntPtr)

WlanFreeMemory(ppAvailableNetworkList);

        WlanFreeMemory(ptr);

            WlanFreeMemory(ptr);

     WlanFreeMemory(ptr)

         WlanFreeMemory(ptr)