[TYPO3] How to get table field in typoscript?

[Gary Wong]

I've been hacking at typoscript for a while, but still so much to 
learn.  Can someone shed a light on how to do this:

I have a custom table (tx_mytable) with an email field in it.
I have a mailformplus plugin on a page and an extended template on it to 
configure the mailformplus plugin.
I want to assign the default email admin recipient to an email from a 
record in my custom table based on a GET variable representing the UID 
of the custom record passed into that page.
This, of course, won't work.

-----------------------
temp.getemail=TEXT
temp.getemail {
    table=tx_mytable
    select.where= {global:HTTP_GET_VARS|uid}
    field=email
}

plugin.tx_thmailformplus_pi1.default.email_to < temp.getemail
-----------------------

But it's logistically what I'd like to do.  Anyone?

Thank you in advance,
Gary