MS Access and Internet - About uses NetBios() to get MAC,HELP!!!

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About uses NetBios() to get MAC,HELP!!!

ÅËµÂ¾ü

2006-01-04, 8:25 pm

I uses NetBios() to get MAC ,but NetBios() always return value 35.
Why?
Anybody help me?

bellow is the source code£º

Option Explicit

Private Const NCBASTAT = &H33
Private Const NCBNAMSZ = 16
Private Const HEAP_ZERO_MEMORY = &H8
Private Const HEAP_GENERATE_EXCEPT
IONS = &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

Public Function GetNetCard() As String
Dim str As String
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(GetProcess
Heap(), HEAP_GENERATE_EXCEPT
IONS Or
HEAP_ZERO_MEMORY, myNcb.ncb_length)

If pASTAT = 0 Then
Debug.Print "memory allcoation failed!"
Exit Function
End If

myNcb.ncb_buffer = pASTAT
bRet = Netbios(myNcb)

If bRet <> 0 Then
GetNetCard = "Counld not got MAC"
Exit Function
End If

Debug.Print Err.LastDllError

CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)
str = 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

GetNetCard = str
End Function

Douglas J. Steele

2006-01-05, 8:26 pm

You might try asking this in microsoft.public.vb.winapi. You could also
compare your code to what Randy Birch has at
http://vbnet.mvps.org/code/network/macaddress.htm

This newsgroup is for questions about interacting with the internet using
Access, the database product that's part of Office Professional.

--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no private e-mails, please)

"ÅËµÂ¾ü" <pandj@masterservice.com.cn> wrote in message
news:u%231Go5ZEGHA.1312@TK2MSFTNGP09.phx.gbl...
>
> I uses NetBios() to get MAC ,but NetBios() always return value 35.
> Why?
> Anybody help me?
>
> bellow is the source code£º
>
> Option Explicit
>
> Private Const NCBASTAT = &H33
> Private Const NCBNAMSZ = 16
> Private Const HEAP_ZERO_MEMORY = &H8
> Private Const HEAP_GENERATE_EXCEPT
IONS = &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
>
> Public Function GetNetCard() As String
> Dim str As String
> 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(GetProcess
Heap(), HEAP_GENERATE_EXCEPT
IONS Or
> HEAP_ZERO_MEMORY, myNcb.ncb_length)
>
> If pASTAT = 0 Then
> Debug.Print "memory allcoation failed!"
> Exit Function
> End If
>
> myNcb.ncb_buffer = pASTAT
> bRet = Netbios(myNcb)
>
> If bRet <> 0 Then
> GetNetCard = "Counld not got MAC"
> Exit Function
> End If
>
>
> Debug.Print Err.LastDllError
>
> CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)
> str = 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
>
> GetNetCard = str
> End Function
>
>
>
>

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