Getting mutt to autocomplete multiple email addresses

I have a query command specified in my muttrc. Basically it's perl script that searches the corporate ldap server. It works just fine whenever I type 'Q' from the pager and I can even type 'A' to append to the query. My problem is that I couldn't figure out how to select multiple entries. I googled for a while and the best thing out found was typing '^T' while entering text in the To: field. That allowed me to use my query command for sending emails to multiple people. My guess is that it will also work for any other fields as well.