Socket programming using mac address in vc++

You obviously have no idea what a MAC address is or what it's used for.

You can NOT use a MAC address to talk to a device from your application. It is a hardware address used to uniquely identify a device on a physical network segment and ensure a physical signal gets to the correct device on the "wire". It sits between the network layer (transmission protocols like TCP/IP, IPX, AppleTalk, ...) and the physical layer (putting data on "the wire" and decoding the signals from it.)

Want you want to do (use sockets with MAC addresses) is not possible. Communication using Socket programming does not go down that far in the OSI model.

The device MUST have some other addressing scheme on it (be it TCP/IP, IPX, or whatever) because a MAC address can not be used by any application level communication library. Consult the documentation on the device to find out what that is.

You can use raw socket programming to exchange packets on low level using Ethernet protocol.
Ethernet use a binary address unique for each comm card made of 6 octects named MAC, that is the short for Media Access Control address, a hardware address that uniquely identifies each node of a network under IEEE-802 networks (MAC sublayer of OSI Data Link Control (DLC) layer).
Use of raw socket is restricted because of the possibility to intercept and/or modify comm packets. For this reason under linux raw sockets are allowed only as superuser (root), and under Windows raw sockets are disabled since XP-SP2. To use them you need a special driver code like winpcap[^].
Just google for around for ethernet comm or raw sockets and you'll find some info.
Just 2 sites:
Raw socket programming on windows with winsock[^] and RAW ethernet[^]