Add extra field when admin create user

I have created extra field that user can edit on their ‘Your Profile’ page. The extra field also available on WordPress register page. What I want to ask is, how to add the field to User > Add new page ? So, when admin creates a user, admin also input the user’s extra field

With no hooks on that page (User > Add new page) other then user_new_form_tag its not possible to add new fields unless you hack the core file wp-admin/user-new.php .

You could try adding that extra field by adding in in JQuery and processing it when the $_post['action'] == 'adduser' but that wont be very good practice.