通过 Visual Basic 获取网卡地址

2008-02-23 07:01:32来源:互联网 阅读 ()

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[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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