I'm trying to add some CSS to the head part of the CSS but I can't get it to work (I want to add it to the head before the Theme CSS so the plugin user can easily over-ride plugins default CSS without !important over-rides). Here is what I tried:
<?php
add_action('wp_head', 'addCSS');
function addCSS() {
wp_register_style( 'prefix-style', plugins_url('AddToCartStyles.css', __FILE__) );
wp_enqueue_style( 'prefix-style' );
}
?>
EDIT: Maybe the way I worded this was confusing. I Don't want to include the CSS in the plugin Admin Page, I want to include the CSS in the regular theme pages (e.g. the pages the end user will actually see).