Topic       : Retrieving MAC Adapter Address Using NETBIOS
Last Updated: January 22, 1998
Location    : http://www.pcausa.com/whitepapers/netbiosmacaddr.txt

======================================================================
Date: Mon, 25 Aug 1997 09:34:25 -0400
From: david goldberg <daveg@zlogic.com>
Subject: Re: Retrieve network card address?

Here's a chunk of code that we use.  Normally we only run under Win 95,
but I believe it works on NT also.  Info on the Netbios() call should
be available in the MS VC help files.

Hope this helps - Dave Goldberg

NCB ncb;
struct
{
  ADAPTER_STATUS status;
  NAME_BUFFER names[10];
} data;
int i;

// do a "get adapter status" command

memset(&ncb,  '\0', sizeof(NCB));
memset(&data, '\0', sizeof(data));

ncb.ncb_command = NCBASTAT;
ncb.ncb_buffer = &data;
ncb.ncb_length = sizeof(data);
ncb.ncb_lana_num = 0;
strcpy((char *) ncb.ncb_callname,
  "*             ");  // must be 15 chars?
	
Netbios(&ncb);
if (ncb.ncb_retcode != NRC_GOODRET)
  return ncb.ncb_retcode;

for (i = 0; i < 6; i++) 
  EthernetAddress[i] = data.status.adapter_address[i];

====================
 From: Scott Lee <slee@wwa.com>
 Newsgroups: microsoft.public.win32.programmer.networks
 Subject: Re: Hardware MAC address (how to get it)
 Date: Thursday, October 09, 1997 11:57 AM
 
 Thanks for your inputs.
 
 I got it working using Netbios.  The CoCreateGuID api is not reliable. 
 Also, MS said that this api may change.
 
 here is the snibit of the code
 
 Here is a section of code that gets the MAC address.  It works on Win95
 Win98 Win NT 3.51 , 4.0, 5.0.  This was tested while the machine is
 connected to a Token Ring Network and Dialed out. 
 
 // using Netbios interface to get  the mac address
 	
   // enumerate lana number
   memset( &ncb,0,sizeof(ncb));
   ncb.ncb_command = NCBENUM;
   uRc=Netbios(&ncb);
   ncb.ncb_buffer=(char*)&lanaenum;
   ncb.ncb_length=sizeof(lanaenum);
   uRc=Netbios(&ncb);
   if (uRc) return 1;
 
   for( i=0 ; i<lanaenum.length ; i++ )
   {
 
 
     // reset netbios interface
     memset( &ncb , 0 , sizeof(ncb) );
     ncb.ncb_command = NCBRESET;
     ncb.ncb_lana_num = lanaenum.lana[i];
     uRc=Netbios(&ncb);
     if( uRc ) return 1;
 
     memset( &ncb , 0 , sizeof(ncb) );
     ncb.ncb_command = NCBASTAT;
     ncb.ncb_lana_num = lanaenum.lana[i];
     strcpy( ncb.ncb_callname , "*" );
     ncb.ncb_buffer=(char*) &adapter;
     ncb.ncb_length = sizeof( adapter);
 		
     uRc=Netbios(&ncb);
     if(uRc) 
       return 1;
     else
     {
       // in the documentation 0xfe is for ethernet
       // and 0xff is for token ring
       // BUT experiments found that token ring is 0xfe and 
       // 0xff is ethernet.  Also 0xfe is RAS connection as well.
       // For RAS, on 95 ras mac reported as "DEST"
       if( adapter.adapt.adapter_type == 0xfe )  //valid nic
       {
         if( adapter.adapt.adapter_address[0] == '0x44' &
           adapter.adapt.adapter_address[1] == '0x45' &
           adapter.adapt.adapter_address[2] == '0x53' &
           adapter.adapt.adapter_address[3] == '0x54' &
           adapter.adapt.adapter_address[4] == '\0' &
           adapter.adapt.adapter_address[5] == '\0' )
             continue;
 				
         sprintf( szMACAddr , "%02x%02x%02x%02x%02x%02x",
           adapter.adapt.adapter_address[0],
           adapter.adapt.adapter_address[1],
           adapter.adapt.adapter_address[2],
           adapter.adapt.adapter_address[3],
           adapter.adapt.adapter_address[4],
           adapter.adapt.adapter_address[5]);
         return 0;
       }
     }
   }
 
 Hope this helps