Hi Aamir,
See if these links below helps you
http://www.magnetismsolutions.co.nz/blog/paulnieuwelaar/2013/10/22/working-with-dynamics-crm-2013-composite-fields-fly-out-menu
https://msdn.microsoft.com/en-in/library/dn481581.aspx?f=255&MSPPError=-2147217396
Hope it helps!
Regards, Abhishek Bakshi If you find this post helpful then please Vote as Helpful and Mark As Answer. Check my blog on https://mydynamicscrmblog.wordpress.com/