How to include custom style in plugin
Below is the code to how to add your custom stylesheet in your custom plugin.
function event_ticker_assets_cb(){
$plugin_url = plugin_dir_url( __FILE__ );
wp_enqueue_style( 'style-event-ticker', $plugin_url . "event_style.css", false, time(), 'all');
}
add_action('wp_enqueue_scripts', "event_ticker_assets_cb");