LAN adapter hardware address

[mojarqirbal]

I need to get the hardware address a LAN adapter, in the same way as IPCONFIG /all, NBTSTAT and WINIPCFG report. I could do this with a batch file, then read the results with VB but I'm looking for a VB only solution. Does anyone have any ideas?

[John]

I found this source code somewhere in the depths of my hard disk. I've not had a chance to test it, so it may not work.

Private Const NAME_FLAGS_MASK = &H87
Private Const GROUP_NAME = &H80
Private Const UNIQUE_NAME = &H0
Private Const REGISTERING = &H0
Private Const REGISTERED = &H4
Private Const DEREGISTERED = &H5
Private Const DUPLICATE = &H6
Private Const DUPLICATE_DEREG = &H7


Private Type NTWRKCNTRLBLCK
    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(0 To 15) As Byte
    ncb_name(0 To 15) As Byte
    ncb_rto As Byte
    ncb_sto As Byte
    lpFunc As Long
    ncb_lana_num As Byte
    ncb_cmd_cplt As Byte
    ncb_reserve(0 To 9) As Byte
    ncb_event As Long
    End Type


Private Type LANA_ENUM
    length As Byte
    lana(0 To 256) As Byte
    End Type


Private Type ADAPTER_STATUS
    adapter_address(0 To 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_(0 To 15) As Byte
    name_num As Byte
    name_flags As Byte
    End Type


Private Type NET_STATUS
    Adapter As ADAPTER_STATUS
    NameBuffer(30) As NAME_BUFFER
    End Type
    Private Const NCBENUM = &H37
    Private Const NCBRESET = &H32
    Private Const NCBASTAT = &H33


Private Declare Function NetBios Lib "netapi32.dll" Alias "Netbios"
    (ByRef pncb As NTWRKCNTRLBLCK) As Byte


Private Declare Function VarPtr Lib "MSVBVM50.DLL" (pVoid As Any) As
    Long

Private Function GetMacAddr() As String
    Dim NCB As NTWRKCNTRLBLCK, Status As NET_STATUS, LanEnum As
    LANA_ENUM
    Dim bReturn As Byte, sMacAddress As String, i As Integer, sHex As
    String, l%
    Dim k%, iNumNames%, j%, m%, sName$, sBuff$, iPos%, nFlags%
    NCB.ncb_command = NCBENUM
    NCB.ncb_buffer = VarPtr(LanEnum)
    NCB.ncb_length = LenB(LanEnum)
    bReturn = NetBios(NCB)
    sBuff = ""
    l = LanEnum.length


    If l > 0 Then


        For k = 0 To l
            NCB.ncb_command = NCBRESET
            NCB.ncb_lana_num = LanEnum.lana(k)
            bReturn = NetBios(NCB)
            
            NCB.ncb_command = NCBASTAT
            NCB.ncb_lana_num = LanEnum.lana(k)
            NCB.ncb_callname(0) = 42 'Max number of sessions
            42


            For i = 1 To 14
                NCB.ncb_callname(i) = 32 'Max number of names
                32, Use NAME_NUMBER_1
            Next i
            NCB.ncb_callname(15) = 0
            NCB.ncb_buffer = VarPtr(Status)
            NCB.ncb_length = LenB(Status)
            bReturn = NetBios(NCB)
            sBuff = sBuff & "Network #" & Hex$(k) & vbCrLf &
            Chr$(9)
            sMacAddress = ""


            For i = 0 To 5
                sHex = Hex(Status.Adapter.adapter_address(i))
                If Len(sHex) = 1 Then sHex = "0" & sHex
                sMacAddress = sMacAddress & sHex
                If i <> 5 Then sMacAddress = sMacAddress + "-"
            Next i
            sBuff = sBuff & "Mac Address = " & UCase(sMacAddress) &
            vbCrLf & Chr$(9)
            sBuff = sBuff & "Adapter Type = " &
            Hex$(Status.Adapter.adapter_type) & vbCrLf & Chr$(9)
            iNumNames = Status.Adapter.name_count
            sBuff = sBuff & "Name Count = " & Hex$(iNumNames) &
            vbCrLf & Chr$(9)


            If iNumNames > 0 Then


                For j = 0 To iNumNames - 1
                    sName = ""


                    For m = 0 To 15
                        sName = sName &
                        Chr$(Status.NameBuffer(j).name_(m))
                    Next m
                    iPos = InStr(sName, Chr$(0))
                    If iPos Then sName = Left$(sName, iPos - 1)
                    sName = Trim$(sName)
                    nFlags = Status.NameBuffer(j).name_flags


                    If (nFlags And GROUP_NAME) = GROUP_NAME Then
                        sBuff = sBuff & "WorkGroup Name is #" &
                        Hex$(j + 1) & " = " & sName & vbCrLf & Chr$(9) & Chr$(9)
                    Else
                        sBuff = sBuff & "Name #" & Hex$(j + 1) &
                        " = " & sName & vbCrLf & Chr$(9) & Chr$(9)
                    End If
                    sBuff = sBuff & "Name Flags = " &
                    Hex$(nFlags) & vbCrLf & Chr$(9)
                Next j
            Else
                sBuff = sBuff & "No Names" & vbCrLf & Chr$(9)
            End If
            sBuff = sBuff & vbCrLf
        Next k
    End If
    GetMacAddr = sBuff
End Function


Private Sub Command1_Click()
    Text1 = GetMacAddr()
End Sub