Vista - Detecting network synchronisation status�

I have designed a website using ASP (Visual Basic) which our staff use both
interally and externally (i.e. on and off our network). Browsing network
folders is available to the user when using the site on the network. However,
if the user has a laptop which has not synchronised with the server, network
folders set for synchronisation appear empty when they are not.

I understand the reasons for this, however I would like to be able to
present the users with a friendly warning if they have not synchronised their
laptop. Is there some sort of system flag I can access which will tell me
whether a given laptop client has synchronised with the network or not (the
same trigger which makes the Synchronisation Manager icon appear on the task
bar)?

Thanks