Form

<h1>Send Newsletter</h1>
        <form method="POST" action="" enctype="multipart/form-data">

            <input type="hidden" name="send_newsletter" value="true" />
            <input type="hidden" name="send_email" id="send_email" value="<?php echo get_option('hw_email_address');?>"/>
            <p>Newsletter Subject</br>
            <input type="text" name="subject" id="subject" size="50" value="<?php if($_POST['subject']){ echo $_POST['subject']; } ?>"/></p>

            <p>Newsletter Content</br>
            <?php
                if($_POST['message']){ $content = $_POST['message']; }else{ $content = ''; }
                $args = array(
                  wpautop               => false,
                  media_buttons         => true,
                  tinymce               => true,
                );
                wp_editor($content,'message',$args); ?>
          </p>
            <p><input type="submit" name="search" value="Send Newsletter" class="button" /></p>
        </form>