It's been some time since I even looked at this UDF, but I put together GetWebFolder at one time to check for Dropbox, Gdrive, and one that was called Skydrive, now called OneDrive. Maybe it will give you some direction.
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Number=204938#Post204938
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(... better days ahead)
