Register TinyMCE Plugin and Button
James DiGioia
add_filter( 'mce_external_plugins', 'plugin_slug_add_button' );function plugin_slug_add_button( $plugins ) {$plugins['plugin_slug'] = 'path/to/editor/plugin.js';return $plugins;}add_filter( 'mce_buttons', 'plugin_slug_register_button' );function plugin_slug_register_button( $buttons ) {array_push( $buttons, 'plugin_slug' );return $buttons;}
register-tiny-mce-plugin.php