Editing files with VIM I can easily copy & paste the name ( or the full path ) of the file I'm working on ( to understand what I mean about VIM you can see: this question or wiki );
Is there an equivalent solution by using Notepad++ ?, how can I do?
Notepad++ has no default shortcut to do that, but:
open menu: "Edit" (Alt-E) then select: "Copy to clipboard" and you have different options to copy the fully qualified file name for current document or parts of it.
See this wiki for exhaustive reference.