如何通过VB获取网卡的地址

　　


                  　　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。