iphone sdk: unedited sms body

I am creating an application that sends SMS while after click on a button. To implement SMS functionality I used MFMessageC开发者_如何学编程omposeViewController. But when I click on my button to send SMS the MessageUI view controller is displayed along with my custom SMS body. I dont want to let user edit SMS body, I just need to send the SMS as it is.

Can any one help me in solving this.? Thanks.

---

You can not prevent user from editing sms body.