WordPress at a glance
filter is not described

show_recent_comments_widget_style filter-hook . WP 3.1.0

Filters the Recent Comments default widget styles.

Usage

add_filter( 'show_recent_comments_widget_style', 'filter_function_name_6123', 10, 2 );
function filter_function_name_6123( $active, $id_base ){
	// filter...

	return $active;
}
$active(true/false)
Whether the widget is active.
Default: true
$id_base(string)
The widget ID.

Where the hook is called

WP_Widget_Recent_Comments::recent_comments_style()
wp-includes/widgets/class-wp-widget-recent-comments.php 53
|| ! apply_filters( 'show_recent_comments_widget_style', true, $this->id_base ) )

Where the hook is used (in WP core)

Does not used.