WordPress at a glance
action is not described

bulk_edit_custom_box action-hook . WP 2.7.0

Fires once for each column in Bulk Edit mode.

Usage

add_action( 'bulk_edit_custom_box', 'action_function_name_1605', 10, 2 );
function action_function_name_1605( $column_name, $post_type ){
	// action...
}
$column_name(string)
Name of the column to edit.
$post_type(WP_Post)
The post type slug.

Where the hook is called

WP_Posts_List_Table::inline_edit()
bulk_edit_custom_box
wp-admin/includes/class-wp-posts-list-table.php 1745
do_action( 'bulk_edit_custom_box', $column_name, $screen->post_type );

Where the hook is used (in WP core)

Does not used.