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Public Const NCBNAMSZ As Long = 16 'Lunghezza massima del NomeHost: ?da protocollo NetBios, non cambiare!
Public Const HEAP_ZERO_MEMORY As Long = &H8
Public Const HEAP_GENERATE_EXCEPTIONS As Long = &H4
Public Const NCBRESET As Long = &H32Public Type NET_CONTROL_BLOCK
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 TypePublic 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 TypePublic Type NAME_BUFFER
name As String * NCBNAMSZ
name_num As Integer
name_flags As Integer
End TypePublic Type ASTAT
adapt As ADAPTER_STATUS
NameBuff(30) As NAME_BUFFER
End TypePublic Declare Function Netbios Lib "netapi32.dll" (pncb As NET_CONTROL_BLOCK) As BytePublic Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)Public Declare Function GetProcessHeap Lib "kernel32" () As LongPublic Declare Function HeapAlloc Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As LongPublic Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, ByVal dwFlags As Long, lpMem As Any) As Long
Public Function DaiMACAddress(ByVal NomeHost As String) As String
On Error Resume Next
Dim Tmp As String, pASTAT As Long
Dim NCB As NET_CONTROL_BLOCK, AST As ASTAT
Dim NomeGiusto As Boolean
NCB.ncb_command = NCBRESET 'resetta la mia Interfaccia
Call Netbios(NCB)
'La lunghezza massima del Nome host ?16 caratteri
NCB.ncb_callname = NomeHost 'setta l'host remoto di cui si vuol
NCB.ncb_command = NCBASTAT 'conoscere il MAC e richiede le info
NCB.ncb_lana_num = 0 'forza la lettura dei dati sull'interfaccia 0
NCB.ncb_length = Len(AST) 'ALTRIMENTI SE SI HANNO + INTERFACCE BISOGNA
'LEGGERE SU OGNUNA
'gestisce l'Heap per l'allocazione dinamica della struttura NET_CONTROL_BLOCK
pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, NCB.ncb_length)
'controllo sul puntatore pASTAT
If pASTAT = 0 Then
Debug.Print "Errore nell'allocazione della Memoria"
Exit Function
End If
'riempie i Dati nella struttura ASTAT
NCB.ncb_buffer = pASTAT
Call Netbios(NCB)
CopyMemory AST, NCB.ncb_buffer, Len(AST)
'controlla i dati ritornati e che hanno riempito la struttura ASTAT
NomeGiusto = False
For t = 0 To 5
If AST.adapt.adapter_address(t) <> 0 Then
NomeGiusto = True
Exit For
End If
Next
'se l'hosto non ?raggiungibile ritorna 0 in tutto l'array e NomeGiusto ?false
If NomeGiusto = True Then
Tmp = Format$(Hex(AST.adapt.adapter_address(0)), "00") & "-" & Format$(Hex(AST.adapt.adapter_address(1)), "00") & "-" & Format$(Hex(AST.adapt.adapter_address(2)), "00") & "-" & Format$(Hex(AST.adapt.adapter_address(3)), "00") & "-" & Format$(Hex(AST.adapt.adapter_address(4)), "00") & "-" & Format$(Hex(AST.adapt.adapter_address(5)), "00")
HeapFree GetProcessHeap(), 0, pASTAT
DaiMACAddress = Tmp
Else
DaiMACAddress = "-1"
End If
End Function'***************** ESEMPIO DI APPLICAZIONE ********************Private Sub Command1_Click()
Screen.MousePointer = vbHourglass
x = DaiMACAddress(UCase(Text1.Text))
If x = "-1" Then x = "Host Inesistente"
LblMAC = x
LblMAC.Refresh
Screen.MousePointer = vbNormal
End Sub好像只能得到局域网得mac地址,internet应该不行.