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在VB中如何得到网络中某一台电脑(电脑名)的网卡地址
发表日期:2003-07-21作者:[] 出处:  

[程序语言] Microsoft Visual Basic 4.0,5.0,6.0

[运行平台] WINDOWS

[功能描述] IPX和NETBIOS接口需要网络地址。该文通过详细的步骤演示了如何通过VB获取网卡地址。

步骤:

1)在Visual Basic生成标准的EXE文件。缺省创建 Form1。

2)在Form1中添加一命令按钮,缺省名为Command1。

3)把下列代码放到Form1中说明部分。

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

把下面的代码放入Command1_Click的事件中:

Private Sub Command1_Click()

  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!"

    Exit Sub

  End If

  myNcb.ncb_buffer = pASTAT

  bRet = Netbios(myNcb)

  Debug.Print Err.LastDllError

  CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)

  MsgBox 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 Sub

4)按F5,运行该程序。

5)点击Command1。注意,网卡地址将在一信息框中显示出来。

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