Thanks. I was hoping this could be done without a plug-in. This seems like a feature that should be native.
The functions missing are the HTML, CSS, link-checking, etc. features that CSE HTML Validator has (I’m the developer of that software)… I want Notepad++ users to be able to easily open their HTML & CSS documents in CSE HTML Validator for testing/checking. I’ve described it here for Notepad++ and some other editors:
https://www.htmlvalidator.com/htmlval/integration.html
Most other editors either auto-save the current/active document or have an option to do so when running a command.