110.txt

VB文章集（含API、窗口、数据库、多媒体、系统、文件、等等）

在VB中如何得到网络中某一台电脑(电脑名)的网卡地质？
[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。