You can very much draw a border on a windows and a "close" button without any libraries. Usually, I'd understand if you're lazy and can't be bothered and just

You can very much draw a border on a windows and a "close" button without any libraries. Usually, I'd understand if you're lazy and can't be bothered and just pull in some dependency to do it for you, but if you're implementing a toolkit, this is the kind of thing that is SHOULD provide.