If you use a hidden fields with custom_ prefix, you’ll be able to use this custom-field in your ARP messages.
For example, if you insert a field like this:

You’ll be able to use the custom dynamic tag {CUSTOM_affilate} in your ARP messages to insert the actual username. So a link in your message would look like this:
http://www.mydomain.com/showaff.php?id={CUSTOM_affiliate}

Michel

Into the form, so that I can use that value in my follow up emails, so the affiliate still gets credit.
I could then use http://www.mydomain/{affiliate username} inside ARP.

Would it work if I put the URL inside value like
value=”‘
+http://www.mydomain.com/showaff.php?id=name+
‘”

Thank you so much for your help.
George

Yes, sure.
Insert a javascript inside your ARP form code like below:

<form method="post"
action="http://yoursite.com/cgi-bin/arp3/arp3-formcapture.pl">
Name: <input name="first_name">
Email: <input name="email">
<input name="id" value="1" type="hidden">

</form>

The username variable should be determinated before the form-code.

Hope this helps.

\Michel

Thank You for your very fast service on installing my autoresponder.
I have a question if you don’t mind.

I am trying to automatically put an affiliate username into an Autoresponse Plus sign-up form using javascript, maybe with the custom tag.
Is this possible?