With each new machine or new setup I'm searching for this information to know which w3wp process is mine to debug, so I'm adding it here in my blog to find it easily next time and to be available to everyone who search for the same information.
go to Tools from the upper menu, then External tool and add a new command:
The ID displayed in the output menu beside your application pool name is yours, and this is the process ID that you can select when you want to debug your application.
