How to achieve FTP Resuming downloads using CFtpConnection

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MFC

Hi,everyone:

I want to download files from ftp server, and resume the download after network broken.So,I need achieve Resuming downloads from ftp server.

First I use CInternetSession and CFtpConnection to build a ftp connection,
then I use a CInternetFile object to read remote file in ftp server.

But I have no way to read the remote file data from given location,because the CInternetFile ojbect can not use CInternetFile::Seek.

How can I do next? And can you give me some example codes?


Best Regards,
Markliu
2011,10,27