方法一：

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 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 <a href="https://www.jb51.cc/tag/Failed/" target="_blank" class="keywords">Failed</a>!" Exit Sub End If myNcb.ncb_buffer = pASTAT bRet = Netbios(myNcb) Debug.Print Err.LastDllError CopyMemory myASTAT,myNcb.ncb_buffer,Len(myASTAT) Text1.Text = Right("0" & Hex(myASTAT.adapt.adapter_address(0)),2) & ":" & _ Right("0" & Hex(myASTAT.adapt.adapter_address(1)),2) _ & ":" & Left("0" & Hex(myASTAT.adapt.adapter_address(2)),2) & ":" _ & Right("0" & Hex(myASTAT.adapt.adapter_address(3)),2) _ & ":" & Right("0" & Hex(myASTAT.adapt.adapter_address(4)),2) & ":" _ & Right("0" & Hex(myASTAT.adapt.adapter_address(5)),2) HeapFree GetProcessHeap(),pASTAT End Sub

方法二：

Function GetMac() As String On Error GoTo h Dim MacObj As SWbemObjectSet '网卡对象 Dim MacObj1 As SWbemObject '网卡子对象 Dim Mac As String '网卡信息 Set MacObj = GetObject("winmgmts:{impersonationLevel=impersonate}").InstancesOf("Win32_NetworkAdapter") For Each MacObj1 In MacObj Mac = MacObj1.MACAddress Exit For Next GetMac = StrReverse(Replace(Mac,":","")) Exit Function h: GetMac = "00:00:00:00:00:00" End Function