For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.
In terms of the debugger architecture, a process:
Is a container for a set of programs. It is closely analogous to a Windows process, which is a container for a set of threads.
Can identify itself by name, identifier, or physical identifier.
Can enumerate all running programs (and their threads).
Can describe itself, the port it is running in, and the machine that contains it.
Can create one or more programs, terminate any of the programs it creates, or cause a program to stop.
The debug package can attach a debug engine (DE) to a process by calling Attach. This means that the DE attaches to all possible programs running in the process that it can handle. For example, if the common language runtime DE attaches to a process, it attaches only to programs that are running managed code.