To the best of my knowledge.. no.. This is because the "phone" app works within its own sandbox and therefore nothing from other applications can extract data out.. Also, I'm pretty sure its against the Terms and conditions of the appstore, so Apple wouldn't approve it.
It may be possible on a jailbroken phone, however I imagine it would be difficult to do..
Sorry!
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…