I'd like to add a function to ZohoRecruit Candidate page which leads to send-email form.

In this form, a user 

1) select email template, change some words, 

2) send mail "to" not default email addresses and  "bcc" to another address.

To do this, I've made a "link" as below.

" https://recruit.zoho.com/recruit/EntReply.do?action=compose&entId=${Candidate.Candidate Id}&module=Candidates&entEmail=${Candidate.Email_2},${Candidate.Email_3}"

1) I'd like to know how to add "bcc" address. "entEmail" seems to be a keyword of "to", I wanna know keyword of "bcc".

2) any other way to do what i want? use "button" and call some method seems to be better way, but I've not tried this...

Thank you 

Tadashi