How to program if Google Drive has finished syncing

I am looking for a way to capture the event that the google drive has completed syncing. I was hoping to find a hook in the google desktop app, but it doesn't seem to be possible.

Platform = Windows Server 2008
If native code is required (i.e. a non-loadable application) - the ideal language is C #, although it is open to other solutions.

One confusion for me - the Google Drive web api allows file manipulation, but I couldn't find anything about the full "sync" function. Did I miss this? Or it just doesn't exist.