读出网卡号码

最新推荐文章于 2024-07-12 14:52:09 发布

原创最新推荐文章于 2024-07-12 14:52:09 发布 · 832 阅读

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#integer #byte #function #buffer #command #string

博客给出了一段VBA代码，定义了多个常量和类型，声明了多个函数。包含获取以太网地址的函数EthernetAddress，通过Netbios函数进行网络操作，最终实现获取指定LanaNumber的以太网地址，并在按钮点击事件中显示该地址。

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
ncb_retcode As Byte
ncb_lsn As Byte
ncb_num As Byte
ncb_buffer As Long
ncb_length As Integer
ncb_callname As String * NCBNAMSZ
ncb_name As String * NCBNAMSZ
ncb_rto As Byte
ncb_sto As Byte
ncb_post As Long
ncb_lana_num As Byte
ncb_cmd_cplt As Byte
ncb_reserve(9) As Byte ' Reserved, must be 0
ncb_event As Long
End Type
Private Type ADAPTER_STATUS
adapter_address(5) As Byte
rev_major As Byte
reserved0 As Byte
adapter_type As Byte
rev_minor As Byte
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

Private Function EthernetAddress(LanaNumber As Long) As String
Dim udtNCB      As NCB
Dim bytResponse As Byte
Dim udtASTAT    As ASTAT
Dim udtTempASTAT As ASTAT
Dim lngASTAT    As Long
Dim strOut      As String
Dim x            As Integer
udtNCB.ncb_command = NCBRESET
bytResponse = Netbios(udtNCB)
udtNCB.ncb_command = NCBASTAT
udtNCB.ncb_lana_num = LanaNumber
udtNCB.ncb_callname = "* "
udtNCB.ncb_length = Len(udtASTAT)
lngASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, udtNCB.ncb_length)
strOut = ""
If lngASTAT Then
    udtNCB.ncb_buffer = lngASTAT
    bytResponse = Netbios(udtNCB)
    CopyMemory udtASTAT, udtNCB.ncb_buffer, Len(udtASTAT)
    With udtASTAT.adapt
      For x = 0 To 5
        strOut = strOut & Right$("00" & Hex$(.adapter_address(x)), 2)
      Next x
    End With
    HeapFree GetProcessHeap(), 0, lngASTAT
End If
EthernetAddress = strOut
End Function