Visual_Composer-Event_Espresso_4-Integration.php

 /**
 * Here is a patch to bring Visual Composer into Event Espresso 4.
 *
 * Tested on Visual Composer 4.11 and Event Espresso 4.
 *
 * Instructions:
 * 1) Add this to the end of functions.php or any is_admin() included file.
 **/
 
add_action('admin_print_scripts', function() {
        global $vc_manager;
        if (!array_key_exists('page', $_REQUEST)) {
                return;
        }
        if (!preg_match('#^espresso_.*#is', $_REQUEST['page'])) {
                return;
        }
        if (!isset($vc_manager) || !$vc_manager) {
                return;
        }
        $e = &$vc_manager->backendEditor();
        call_user_func(array(&$e, 'printScriptsMessages'));
});

For anyone who wants to bring the functionality of Visual Composer into EventEspresso.

Only tested on VC 4.11 and EE4.