My New Hooks: Will This Work?

[Firefox Wins]

Hi, I'll test this myself, just looking for some idea if it will work as expected.
On a 'custom' page which includes global.php:
i.e.

PHP Code:

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<?php define('IN_MYBB', 1); require_once './global.php'; // comments here.... // code here.... $plugins->run_hooks("thispage_mynewhook); // more code here.... ?>

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...now will this 'new hook' be available to a MyBB plugin?
Is it really that easy, or do I need to include other file(s), and / or...
...how are new MyBB hooks created?

Thank you very much