[libvirt] IP Address of a domain

Hello, I would like to obtain the IP Address of a domain using the libvirt API. I see that the XMLDesc gives the MAC address, but not the IP Address. I found out that the "vncdisplay" command option from "virsh" command line tool provides the IP Address and port number. How would I obtain this info using libvirt API. Please help. I am using libvirt version libvirtd (libvirt) 0.6.3. Thanks and Regards Sagar Barve