How to see what data a windows application send through my network?

I want to see what a application send to network and if is possibl开发者_如何学运维e to edit or stop them. thanks ;)

I would definitely recommend WireShark. But be careful, if this is a corporate network you will need permission. Sniffing traffic can sometimes be cause for instant termination, so get it in writing!

Changing and editing traffic are much more complex tasks. That answer really depends on what you want to do.