Hi, I am currently doing some research on building an app to send files
over a network. We are wanting to only send changes in files if the file
is already on the other computer.

Is there a way to *quickly* detect changes between
the file on the other computer (server) and the computer we are sending
from?

I have looked into polling, but unfortunately, polling just lets us
know if the file has changed. We need a way to detect block level (like on
the hard drive) changes or have the OS (Windows, Unix) send us details on
files that are being changed and where in the file something has been
changed.

Any help, links, or suggestions would be greatly appreciated

and I hope I posted on the write newsgroup... ;)

Josh <><