I want to know where the Dropbox overlay syncing icons are stored on my windows machine as i build a syncing app like Dropbox and i want to use them.
You can use something like Resource Hacker to extract the icons from the Dropbox.exe
file:
On a side note: I think you're better off getting icons that are free to use from a website like IconFinder where you can filter by license instead of using the (potentially copyrighted?) ones from DropBox.