MFC 获取MAC地址问题？

[wooyybb]

void CMy0065114Dlg::OnButton1()
{
// TODO: Add your control notification handler code here
NCB ncb;
UCHAR uRetCode;
LANA_ENUM lana_enum;

memset( &ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBENUM;

ncb.ncb_buffer = (unsigned char *) &lana_enum;
ncb.ncb_length = sizeof(lana_enum);
uRetCode = Netbios( &ncb );
if ( uRetCode == 0 )
{ int num=lana_enum.length;
for ( int i=0; i <num;i++)
{
getmac_one (lana_enum.lana[i]);
}
}
}

void CMy0065114Dlg::getmac_one(int lana_num)
{

CString str;
NCB ncb;
UCHAR uRetCode;

memset( &ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBRESET;
ncb.ncb_lana_num = lana_num;

uRetCode = Netbios( &ncb );

memset( &ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBASTAT;
ncb.ncb_lana_num = lana_num;

strcpy((char *)ncb.ncb_callname,"*");
ncb.ncb_buffer = (unsigned char *) &Adapter;

ncb.ncb_length = sizeof(Adapter);

uRetCode = Netbios( &ncb );

if ( uRetCode == 0 )
{
str.Format("%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] );
SetDlgItemText(IDC_DD,str);

}

}

只获取了无线网卡的MAC，主板的网卡MAC并未获取！求解？