captcha-module/application/component/widget/oewarticledetails.php

<?php
/**
 * #PHPHEADER_OECAPTCHA_LICENSE_INFORMATION#
 */

/**
 * Article detailed information widget.
 */
class oewArticleDetails extends oewArticleDetails_parent
{
    /**
     * Class handling CAPTCHA image.
     *
     * @var object
     */
    protected $captcha = null;

    /**
     * Template variable getter. Returns object of handling CAPTCHA image
     *
     * @return object
     */
    public function getCaptcha()
    {
        if ($this->captcha === null) {
            $this->captcha = oxNew('oeCaptcha');
        }
        return $this->captcha;
    }
}