58.htm

一些简单的编程例子 都是网页的形式

<p>如何通过VB获取网卡地址 </p>
<p></p>
<p>[程序语言] Microsoft Visual Basic 4.0,5.0,6.0</p>
<p>[运行平台] WINDOWS</p>
<p>[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。</p>
<p></p>
<p>步骤：</p>
<p></p>
<p>1)在Visual Basic生成标准的EXE文件。缺省创建 Form1。 </p>
<p>2)在Form1中添加一命令按钮，缺省名为Command1。 </p>
<p>3)把下列代码放到Form1中说明部分。 </p>
<p></p>
<p>Option Explicit</p>
<p>Private Const NCBASTAT = &H33</p>
<p>Private Const NCBNAMSZ = 16</p>
<p>Private Const HEAP_ZERO_MEMORY = &H8</p>
<p>Private Const HEAP_GENERATE_EXCEPTIONS = &H4</p>
<p>Private Const NCBRESET = &H32</p>
<p></p>
<p>Private Type NCB</p>
<p>　　ncb_command As Byte 'Integer</p>
<p>　　ncb_retcode As Byte 'Integer</p>
<p>　　ncb_lsn As Byte 'Integer</p>
<p>　　ncb_num As Byte ' Integer</p>
<p>　　ncb_buffer As Long 'String</p>
<p>　　ncb_length As Integer</p>
<p>　　ncb_callname As String * NCBNAMSZ</p>
<p>　　ncb_name As String * NCBNAMSZ</p>
<p>　　ncb_rto As Byte 'Integer</p>
<p>　　ncb_sto As Byte ' Integer</p>
<p>　　ncb_post As Long</p>
<p>　　ncb_lana_num As Byte 'Integer</p>
<p>　　ncb_cmd_cplt As Byte 'Integer</p>
<p>　　ncb_reserve(9) As Byte ' Reserved, must be 0</p>
<p>　　ncb_event As Long</p>
<p>End Type</p>
<p></p>
<p>Private Type ADAPTER_STATUS</p>
<p>　　adapter_address(5) As Byte 'As String * 6</p>
<p>　　rev_major As Byte 'Integer</p>
<p>　　reserved0 As Byte 'Integer</p>
<p>　　adapter_type As Byte 'Integer</p>
<p>　　rev_minor As Byte 'Integer</p>
<p>　　duration As Integer</p>
<p>　　frmr_recv As Integer</p>
<p>　　frmr_xmit As Integer</p>
<p>　　iframe_recv_err As Integer</p>
<p>　　xmit_aborts As Integer</p>
<p>　　xmit_success As Long</p>
<p>　　recv_success As Long</p>
<p>　　iframe_xmit_err As Integer</p>
<p>　　recv_buff_unavail As Integer</p>
<p>　　t1_timeouts As Integer</p>
<p>　　ti_timeouts As Integer</p>
<p>　　Reserved1 As Long</p>
<p>　　free_ncbs As Integer</p>
<p>　　max_cfg_ncbs As Integer</p>
<p>　　max_ncbs As Integer</p>
<p>　　xmit_buf_unavail As Integer</p>
<p>　　max_dgram_size As Integer</p>
<p>　　pending_sess As Integer</p>
<p>　　max_cfg_sess As Integer</p>
<p>　　max_sess As Integer</p>
<p>　　max_sess_pkt_size As Integer</p>
<p>　　name_count As Integer</p>
<p>End Type</p>
<p></p>
<p>Private Type NAME_BUFFER</p>
<p>　　name As String * NCBNAMSZ</p>
<p>　　name_num As Integer</p>
<p>　　name_flags As Integer</p>
<p>End Type</p>
<p></p>
<p>Private Type ASTAT</p>
<p>　　adapt As ADAPTER_STATUS</p>
<p>　　NameBuff(30) As NAME_BUFFER</p>
<p>End Type</p>
<p></p>
<p>Private Declare Function Netbios Lib "netapi32.dll" (pncb As NCB) As Byte</p>
<p>Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _</p>
<p>　　(hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)</p>
<p>Private Declare Function GetProcessHeap Lib "kernel32" () As Long</p>
<p>Private Declare Function HeapAlloc Lib "kernel32" _</p>
<p>　　(ByVal hHeap As Long, ByVal dwFlags As Long, _</p>
<p>　　ByVal dwBytes As Long) As Long</p>
<p>Private Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, _</p>
<p>　　ByVal dwFlags As Long, lpMem As Any) As Long</p>
<p></p>
<p>把下面的代码放入Command1_Click的事件中：</p>
<p></p>
<p>Private Sub Command1_Click()</p>
<p>　　Dim myNcb As NCB</p>
<p>　　Dim bRet As Byte</p>
<p>　　myNcb.ncb_command = NCBRESET</p>
<p>　　bRet = Netbios(myNcb)</p>
<p>　　myNcb.ncb_command = NCBASTAT</p>
<p>　　myNcb.ncb_lana_num = 0</p>
<p>　　myNcb.ncb_callname = "*　　　　　　 "</p>
<p>　　Dim myASTAT As ASTAT, tempASTAT As ASTAT</p>
<p>　　Dim pASTAT As Long</p>
<p>　　myNcb.ncb_length = Len(myASTAT)</p>
<p>　　Debug.Print Err.LastDllError</p>
<p>　　pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS _</p>
<p>　　　　Or HEAP_ZERO_MEMORY, myNcb.ncb_length)</p>
<p>　　If pASTAT = 0 Then</p>
<p>　　　　Debug.Print "memory allcoation failed!"</p>
<p>　　　　Exit Sub</p>
<p>　　End If</p>
<p>　　myNcb.ncb_buffer = pASTAT</p>
<p>　　bRet = Netbios(myNcb)</p>
<p>　　Debug.Print Err.LastDllError</p>
<p>　　CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)</p>
<p>　　MsgBox Hex(myASTAT.adapt.adapter_address(0)) & " " & _</p>
<p>　　　　Hex(myASTAT.adapt.adapter_address(1)) _</p>
<p>　　　　& " " & Hex(myASTAT.adapt.adapter_address(2)) & " " _</p>
<p>　　　　& Hex(myASTAT.adapt.adapter_address(3)) _</p>
<p>　　　　& " " & Hex(myASTAT.adapt.adapter_address(4)) & " " _</p>
<p>　　　　& Hex(myASTAT.adapt.adapter_address(5))</p>
<p>　　HeapFree GetProcessHeap(), 0, pASTAT</p>
<p>End Sub</p>
<p></p>
<p>4)按F5，运行该程序。</p>
<p>5)点击Command1。注意，网卡地址将在一信息框中显示出来。</p>
<p> </p>