Kirupa's Flash/PHP email form tutorial

I was trying out Kirupa’s Flash/PHP email form tutorial:
http://www.kirupa.com/developer/actionscript/flash_php_email.htm

However… the tutorial uses input text fields. Ech textfield has a ‘var:’ in the property inspector where I am supposed to name each field in order to send the input to EMAIL.PHP.

Now I would like to make the same form, but using Flash MX 2004 built-in components instead of the standard input text fields. How do I make it work so that the input in each field is sent to the PHP file? I can’t find the ‘var’ option anywhere in the component inspector nor in the properties.

Any help would be appreciated. I’m a complete newbie at Flash and Actionscript, so please help me out.