We are developing a Prism application and starting the application under the debugger is pretty slow due to the loading modules procedure so we start the application and later on we attach to it.
Is there a way (macro, plugin, external tool) to attach to the application that is currently under focus? That would be very convenient.
Following Hans advice I've created a tool that exactly does that:
https://attacher.codeplex.com/
I hope it helps someone with the same need.