Can I create a new comment type?

Hey, I’m not sure that WordPress natively supports this kind of functionality, but what is your use case? Exactly what are you trying to do?

I’m sure there’s a WordPress solution to your problem.

I want to make guestbook type comment, because I don’t want that every type of comment is displayed when getting only recent guestbook type comments (or getting none guestbook type comments only) by a widget. And maybe I hope that I could create another comment type which will be excluded when getting normal type comments later. Thank you.

Why not use a guestbook plugin?

Could I get only none-guestbook comments if I use guestbook plugin?

Sorry? Can you clarify?

Could I get guestbook-excluded comments only by the recent comment widget? And could I get guestbook comments only?

It might be dependant upon which plugin you use but I would imagine that it is possible to have only non-guestbook (ie regular) comments being displayed in the default Recent Comments widget. As for listing only guestbook entries, that would be dependant upon the plugin.

By any chance, could I make a guestbook by creating a custom post-type?

I think that a Custom Post Type would actually be the best way to implement this, either manually, or via a guestbook plugin that says it creates a custom post type for you.

The nature of comments in WordPress is too rigid to use it alone but if you use a Custom Post Type you’ll get all the power/flexibility of a typical post entry.

I have no idea. Comments aren’t actually Posts, so you would be trying to make apples into oranges.

Thank you so much.