Question

VB读取MAC地址

用VB读取MAC地址并与原有的地址进行比对 请给出实现的代码

Answer 1

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Option Explicit

Public CheckCode As Long

Private Const NCBASTAT As Long = &H33
Private Const NCBNAMSZ As Integer = 16
Private Const HEAP_ZERO_MEMORY As Long = &H8
Private Const HEAP_GENERATE_EXCEPTIONS As Long = &H4
Private Const NCBRESET As Long = &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
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

Public Function GetMAC() As Integer

Dim bRet As Byte
Dim myNcb As NCB
Dim myASTAT As ASTAT
Dim pASTAT As Long
Dim intMAC As Integer

myNcb.ncb_command = NCBRESET
bRet = Netbios(myNcb)
With myNcb
.ncb_command = NCBASTAT
.ncb_lana_num = 0
.ncb_callname = "* "
.ncb_length = Len(myASTAT)
pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, .ncb_length)
End With
If pASTAT = 0 Then
Exit Function
End If
myNcb.ncb_buffer = pASTAT
bRet = Netbios(myNcb)
CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)
intMAC = myASTAT.adapt.adapter_address(0)
intMAC = intMAC + myASTAT.adapt.adapter_address(1)
intMAC = intMAC + myASTAT.adapt.adapter_address(2)
intMAC = intMAC + myASTAT.adapt.adapter_address(3)
intMAC = intMAC + myASTAT.adapt.adapter_address(4)
intMAC = intMAC + myASTAT.adapt.adapter_address(5)
GetMAC = intMAC
Call HeapFree(GetProcessHeap(), 0, pASTAT)

End Function

Public Function GetMACAddress() As String

Dim bRet As Byte
Dim myNcb As NCB
Dim myASTAT As ASTAT
Dim pASTAT As Long
myNcb.ncb_command = NCBRESET
bRet = Netbios(myNcb)
With myNcb
.ncb_command = NCBASTAT
.ncb_lana_num = 0
.ncb_callname = "* "
.ncb_length = Len(myASTAT)
pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, .ncb_length)
End With
If pASTAT = 0 Then
Exit Function
End If
myNcb.ncb_buffer = pASTAT
bRet = Netbios(myNcb)
CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)
GetMACAddress = HexEx(myASTAT.adapt.adapter_address(0)) & "-" & HexEx(myASTAT.adapt.adapter_address(1)) & "-" & HexEx(myASTAT.adapt.adapter_address(2)) & "-" & HexEx(myASTAT.adapt.adapter_address(3)) & "-" & HexEx(myASTAT.adapt.adapter_address(4)) & "-" & HexEx(myASTAT.adapt.adapter_address(5))
Call HeapFree(GetProcessHeap(), 0, pASTAT)

End Function

Private Function HexEx(ByVal B As Long) As String

Dim aa As String

aa = Hex$(B)
If Len(aa) < 2 Then
aa = "0" & aa
End If
HexEx = aa

End Function