Finding out the MAC address?

Is there anyway of finding out the MAC address on a NIC card? Alos does a modem have a MAC address?

From within VB, I don't know.. But from Windows, Start / Run and then type in winipcfg

It will give you the adapter address which is the MAC address, I beleive...

Dan

From VB:

Code:

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Private Const NCBASTAT As Long = &H33
Private Const NCBNAMSZ As Long = 16
Private Const HEAP_ZERO_MEMORY As Long = &H8
Private Const HEAP_GENERATE_EXCEPTIONS As Long = &H4
Private Const NCBRESET As Long = &H32

Private Type NET_CONTROL_BLOCK
  ncb_command    As Byte
  ncb_retcode    As Byte
  ncb_lsn        As Byte
  ncb_num        As Byte
  ncb_buffer    As Long
  ncb_length    As Integer
  ncb_callname  As String * NCBNAMSZ
  ncb_name      As String * NCBNAMSZ
  ncb_rto        As Byte
  ncb_sto        As Byte
  ncb_post      As Long
  ncb_lana_num  As Byte
  ncb_cmd_cplt  As Byte
  ncb_reserve(9) As Byte
  ncb_event      As Long
End Type

Private Type ADAPTER_STATUS
  adapter_address(5) As Byte
  rev_major        As Byte
  reserved0        As Byte
  adapter_type      As Byte
  rev_minor        As Byte
  duration          As Integer
  frmr_recv        As Integer
  frmr_xmit        As Integer
  iframe_recv_err  As Integer
  xmit_aborts      As Integer
  xmit_success      As Long
  recv_success      As Long
  iframe_xmit_err  As Integer
  recv_buff_unavail As Integer
  t1_timeouts      As Integer
  ti_timeouts      As Integer
  Reserved1        As Long
  free_ncbs        As Integer
  max_cfg_ncbs      As Integer
  max_ncbs          As Integer
  xmit_buf_unavail  As Integer
  max_dgram_size    As Integer
  pending_sess      As Integer
  max_cfg_sess      As Integer
  max_sess          As Integer
  max_sess_pkt_size As Integer
  name_count        As Integer
End Type

Private Type NAME_BUFFER
  name        As String * NCBNAMSZ
  name_num    As Integer
  name_flags  As Integer
End Type

Private Type ASTAT
  adapt          As ADAPTER_STATUS
  NameBuff(30)  As NAME_BUFFER
End Type

Private Declare Function Netbios Lib "netapi32.dll" (pncb As NET_CONTROL_BLOCK) As Byte
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Private Declare Function GetProcessHeap Lib "kernel32" () As Long
Private Declare Function HeapAlloc Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As Long


Private Function GetAddressMAC() As String
  Dim strBuffer As String
  Dim lngASTAT As Long
  Dim NCB As NET_CONTROL_BLOCK
  Dim AST As ASTAT

  NCB.ncb_command = NCBRESET
  Call Netbios(NCB)
 
  NCB.ncb_callname = "*              "
  NCB.ncb_command = NCBASTAT
 
  NCB.ncb_lana_num = 0
  NCB.ncb_length = Len(AST)
 
  lngASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS _
            Or HEAP_ZERO_MEMORY, NCB.ncb_length)
           
  If lngASTAT = 0 Then
      MsgBox "memory allocation failed!"
      Exit Function
  End If
 
  NCB.ncb_buffer = lngASTAT
  Call Netbios(NCB)
 
  CopyMemory AST, NCB.ncb_buffer, Len(AST)
 
  strBuffer = Format(Hex(AST.adapt.adapter_address(0)), "00") & " " & _
        Format(Hex(AST.adapt.adapter_address(1)), "00") & " " & _
        Format(Hex(AST.adapt.adapter_address(2)), "00") & " " & _
        Format(Hex(AST.adapt.adapter_address(3)), "00") & " " & _
        Format(Hex(AST.adapt.adapter_address(4)), "00") & " " & _
        Format(Hex(AST.adapt.adapter_address(5)), "00")
             
  HeapFree GetProcessHeap(), 0, lngASTAT

  GetAddressMAC = strBuffer
End Function


Private Sub Form_Load()
Text1.Text = GetAddressMAC
End Sub

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I don't think that modems have MAC's but i could be wrong.
Hope that helps,
D!m

As far as I know modems DO have a MAC address (but only while a connection open)... Just my $0.02. Not sure either..

yes modems have mac addresses, from what ive learned is that every host on the internet has one