Is There A Way I Can Lock Just My Text/Messages On My Blackberry Storm?

[KinGofDramA]

I have 5 nosy sisters & friends/family members who all get happy when they find out i just bought the Blackberry Storm, & they mess around with it but always go into my messages I'm still learning things about the phone i know i can lock the whole phone & have a password to unlock it but is there a way I can also lock my messages?

 

[swsumedha]

wannna know some answers for blackberry devicr