Add status icons over file icons in Explorer, like Dropbox or SVN in .NET

Question

I'm writing a Windows service application in C# with FileSystemWatcher.

How can I add status icons to files and folders in Windows Explorer similar to how Dropbox or SVN do it?

Answer 1

You should develop an overlay icon handler and register it into the system.
Here you can find a partially working example written in C#.
Some MSDN documentation here and here.