Question

What is the correct way to add new pages to the wordpress dashboard. Not like creating a dashboard page, but instead make arbitrary pages as needed for use in lightboxes, etc.

One example, I need to query the server to get an “email preview” for a plugin I am working on. How do I create a URL that will run that particular script?

I imagine the URL would be like /wp-admin/index.php?page=my_plugin_email_preview

What functions do I need to get started?

Answer 1

At least:

add_menu_page();
add_submenu_page();