title: How Sharepoint enables editing data via Excel?
body: <p>a Sharepoint Web Query allows saving changed Excel cells back to the server. 
  It's quite simple to come up with a custom JSP(or any other dynamic html producer) page to produce data called in QYI file. 
  My question: is there a way to handle in a JSP page changes in the Excel List when "Synchronize with Server" menu clicked in Excel?
  other words. How exactly Excel sends changes from the edited cell to the Sharepoint server?
  I used TCP trace to see what Excel sends on "synchronize" but so far it did not make much sense. </p>