manage_comments_custom_column action-hook . WP 2.8.0

Fires when the default column output is displayed for a single row.

Usage

add_action( 'manage_comments_custom_column', 'action_function_name_8746', 10, 2 );
function action_function_name_8746( $column_name, $comment_ID ){
	// action...
}

$column_name(string)

The custom column's name.

$comment_ID(int)

The custom column's unique ID number.

Where the hook is called

do_action( 'manage_comments_custom_column', $column_name, $comment->comment_ID );

Where the hook is used (in WP core)