FTP transfer progress bar

Question

I'm trying to write an FTP application by using FTP library provided with LabVIEW Internet Toolkit library.  I have a large file (>1GB) that I want to transfer from PXI Real-time controller to my host computer running Windows XP.  On my windows machine I would like to show the users the progress bar and percent of the file being transferred just like the FTP windows provided by MAX from NI. Please See the attached screen capture.  How do I accomplished that?
Thanks!

Answer 1

The low level file transfer is performed in vi.lib\addons\internet\utils\tcputil.llb\TCP Write Stream.vi
There is a shift register that contains the bytes left unwritten that could be used to determine the progress.
Issues:
You would need to modify this VI to expose the bytes left unwritten to your UI.  In general, its not a good idea to change NI supplied VIs.
This VI is reentrant. It may be possible to have more than one FTP transfer happening at the same time; so using a LabVIEW global to expose the value would not be a good idea.
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