I have an ever changing spreadsheet, and I would like to be able to have it check for updates when a user loads the file (if connection is available). If there is, it will download a .txt file from a server and update the values in the spreadsheet. I'm lost on how I would do this though, is it as difficult as it seems?

I'm sure it's possible through VB, can anyone provide some sample code on how I would do this? (or links)

thanks