[ktjfi]

Part of the Windows 2000 source code leaked and it included Notepad. I don't think it's changed much since then as it's pretty much a wrapper around the Win32 widget with a few features like changing the font, printing, etc.

The only place where I found it where it is publicly "browseable" -> http://www.codeforge.com/article/148667

[_trampeltier]

It seems they updated a couple of things in Notepad (Unix eol, text size, ..) https://hn.algolia.com/?query=windows%20notepad&sort=byDate&...