FTD2XX_NET.FTDI.GetNumberOfDevices C# (CSharp) Method

        public FT_STATUS GetNumberOfDevices(ref UInt32 devcount)
        {
            // Initialise ftStatus to something other than FT_OK
            FT_STATUS ftStatus = FT_STATUS.FT_OTHER_ERROR;

            // If the DLL hasn't been loaded, just return here
            if (hFTD2XXDLL == IntPtr.Zero)
                return ftStatus;

            // Check for our required function pointers being set up
            if (pFT_CreateDeviceInfoList != IntPtr.Zero)
            {
                tFT_CreateDeviceInfoList FT_CreateDeviceInfoList = (tFT_CreateDeviceInfoList)Marshal.GetDelegateForFunctionPointer(pFT_CreateDeviceInfoList, typeof(tFT_CreateDeviceInfoList));

                // Call FT_CreateDeviceInfoList
                ftStatus = FT_CreateDeviceInfoList(ref devcount);
            }
            else
            {
                LogB.Debug("FTD2XX: Failed to load function FT_CreateDeviceInfoList.");
            }
            return ftStatus;
        }

        private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
        {
            FTD2XX_NET.FTDI dev = new FTDI();
            UInt32 numDevices = 0;
            dev.GetNumberOfDevices(ref numDevices);

            var pDest = new FTD2XX_NET.FTDI.FT_DEVICE_INFO_NODE[numDevices];
            dev.GetDeviceList(pDest);

            VIDPIDList = string.Empty;
            for (int i = 0; i < numDevices; i++ )
            {
                VIDPIDList += string.Format("{0} \n", pDest[i].ID);
            }
        }