How to obtain the NIC address Through VB

How to obtain the NIC address Through VB

1) generate a standard EXE file in Visual Basic. Form1 is created by default.

2) Add a command button in Form1. The default name is Command1.

3) place the following code in the description section of Form1.

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_1__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

If rame_recv_err As Integer

Xmit_aborts As Integer

Xmit_success As Long

Recv_success As Long

If rame_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_eclip_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

Put the following code into the commandmediaclick event:

Private Sub commandementclick ()

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 failed! "

Exit Sub

End If

MyNcb. ncb_buffer = pASTAT

BRet = Netbios (myNcb)

Debug. Print Err. LastDllError

CopyMemory myASTAT, myNcb. ncb_buffer, Len (myASTAT)

MsgBox 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

End Su

5) Click Command1. Note: The NIC address is displayed in the information box.