undefined reference to 'Function'

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C++

C

i have this attached with a code. undefined reference to 'SCardEstablishContext@16' and 'SCardConnectA@24' keeps coming. what to do?

SCARDCONTEXT    hSC;
                    LONG            lReturn;
                    // Establish the context.
                    lReturn = SCardEstablishContext(SCARD_SCOPE_USER,
                                                    NULL,
                                                    NULL,
                                                    &hSC);
                    if ( SCARD_S_SUCCESS != lReturn )
                        printf("Failed SCardEstablishContext\n");
                    else
                    {
                        SCARDHANDLE     hCardHandle;
                        LONG            lReturn1;
                        DWORD           dwAP;

                        lReturn1 = SCardConnect( hSC,
                                                (LPCTSTR)"Rainbow Technologies SCR3531 0",
                                                SCARD_SHARE_SHARED,
                                                SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1,
                                                &hCardHandle,
                                                &dwAP );
                        if ( SCARD_S_SUCCESS != lReturn1 )
                        {
                            printf("Failed SCardConnect\n");
                            exit(1);  // Or other appropriate action.
                        }

                        // Use the connection.
                        // Display the active protocol.
                        switch ( dwAP )
                        {
                            case SCARD_PROTOCOL_T0:
                                printf("Active protocol T0\n");
                                break;

                            case SCARD_PROTOCOL_T1:
                                printf("Active protocol T1\n");
                                break;

                            case SCARD_PROTOCOL_UNDEFINED:
                            default:
                                printf("Active protocol unnegotiated or unknown\n");
                                break;
                        }
                    }