Physical Address of the NIC


DevX Home    Today's Headlines   Articles Archive   Tip Bank   Forums   

Results 1 to 3 of 3

Thread: Physical Address of the NIC

Hybrid View

  1. #1
    Join Date
    Apr 2005
    Posts
    4

    Physical Address of the NIC

    Hi there.

    How can read the Physical Address of the NIC from Visual Basic?

    Thanks a lot.

  2. #2
    Join Date
    Jan 2005
    Posts
    49
    The EthernetAddress property contains the Ethernet (MAC/Physical/Network) address of the virtual NIC.

    Property EthernetAddress As String
    Property Value
    Contains the Ethernet address of the virtual NIC. It is in MAC address form of XX-XX-XX-XX-XX-XX where X is a hexadecimal digit with a value in the range of 0-9 or a-f.
    This property value is read/write.
    NN

  3. #3
    Join Date
    May 2005
    Posts
    1

    MAC address of the NIC from Visual Basic

    Hi try this code to get MAC address.



    Option Explicit
    Private Const NCBASTAT = &H33
    Private Const NCBNAMSZ = 16
    Private Const HEAP_ZERO_MEMORY = &H8
    Private Const HEAP_GENERATE_EXCEPTIONS = &H4
    Private Const NCBRESET = &H32

    Private Type NCB
    ncb_command As Byte 'Integer
    ncb_retcode As Byte 'Integer
    ncb_lsn As Byte 'Integer
    ncb_num As Byte ' Integer
    ncb_buffer As Long 'String
    ncb_length As Integer
    ncb_callname As String * NCBNAMSZ
    ncb_name As String * NCBNAMSZ
    ncb_rto As Byte 'Integer
    ncb_sto As Byte ' Integer
    ncb_post As Long
    ncb_lana_num As Byte 'Integer
    ncb_cmd_cplt As Byte 'Integer
    ncb_reserve(9) As Byte ' Reserved, must be 0
    ncb_event As Long
    End Type
    Private Type ADAPTER_STATUS
    adapter_address(5) As Byte 'As String * 6
    rev_major As Byte 'Integer
    reserved0 As Byte 'Integer
    adapter_type As Byte 'Integer
    rev_minor As Byte 'Integer
    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 NCB) 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



    Public Function getMACAddress() As String

    Dim myNcb As NCB
    Dim bRet As Byte
    myNcb.ncb_command = NCBRESET
    bRet = Netbios(myNcb)

    myNcb.ncb_command = NCBASTAT
    myNcb.ncb_lana_num = 0
    myNcb.ncb_callname = "* "

    Dim myASTAT As ASTAT, tempASTAT As ASTAT
    Dim pASTAT As Long
    myNcb.ncb_length = Len(myASTAT)
    ' Debug.Print Err.LastDllError
    pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS _
    Or HEAP_ZERO_MEMORY, myNcb.ncb_length)
    If pASTAT = 0 Then
    ' Debug.Print "memory allcoation failed!"
    getMACAddress = "ERROR"
    Exit Function
    End If
    myNcb.ncb_buffer = pASTAT
    bRet = Netbios(myNcb)
    ' Debug.Print Err.LastDllError
    CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)
    getMACAddress = Hex(myASTAT.adapt.adapter_address(0)) & " " & _
    Hex(myASTAT.adapt.adapter_address(1)) _
    & " " & Hex(myASTAT.adapt.adapter_address(2)) & " " _
    & Hex(myASTAT.adapt.adapter_address(3)) _
    & " " & Hex(myASTAT.adapt.adapter_address(4)) & " " _
    & Hex(myASTAT.adapt.adapter_address(5))
    HeapFree GetProcessHeap(), 0, pASTAT
    End Function


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
HTML5 Development Center
 
 
FAQ
Latest Articles
Java
.NET
XML
Database
Enterprise
Questions? Contact us.
C++
Web Development
Wireless
Latest Tips
Open Source


   Development Centers

   -- Android Development Center
   -- Cloud Development Project Center
   -- HTML5 Development Center
   -- Windows Mobile Development Center