How we Integrate VoiveMail in our application?

[Ankit2502]

Hello Friends,
I want to know something related to VoiceMail. I want to develope one application in which i want to integrate VoiceMail in my application. I want functionality like this :

Suppose there is a incoming call from XYZ and in my application if i set a VoiceMail for XYZ then if i not pick the call then this user will listen VoiceMail which i set for this.

How we store a voicemail using our application?

Is this possible or not please let me know it's very urgent.

Thanks & Regards
Ankit2502