Get Computer Network Information

Category:

Network/Internet

Type:

Applications

Difficulty:

Beginning

Author:

Anonymous

Version Compatibility: Visual Basic 6

More information:

Returns a computer's MachineName, UserName, IP, and Ethernet Address with one click.

Instructions: Copy the declarations and code below and paste directly into your VB project.

Declarations:
'Code submitted by: John Biondo john.biondo@columbia.net 'If you use, plz give me credit, after-all I did a little 'work for this. 'make a form with a command button, and four text boxes on it. 'then place this code into the appropriate areas: Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal sBuffer As String, lSize As Long) As Long Private Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long 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 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

Code:

Public Function NameOfPC(MachineName As String) As Long
    Dim NameSize As Long
    Dim X As Long
    MachineName = Space$(16)
    NameSize = Len(MachineName)
    X = GetComputerName(MachineName, NameSize)
End Function

Private Function EthernetAddress(LanaNumber As Long) As String
  Dim udtNCB       As NCB
  Dim bytResponse  As Byte
  Dim udtASTAT     As ASTAT
  Dim udtTempASTAT As ASTAT
  Dim lngASTAT     As Long
  Dim strOut       As String
  Dim X            As Integer

udtNCB.ncb_command = NCBRESET
  bytResponse = Netbios(udtNCB)
  udtNCB.ncb_command = NCBASTAT
  udtNCB.ncb_lana_num = LanaNumber
  udtNCB.ncb_callname = "* "
  udtNCB.ncb_length = Len(udtASTAT)
  lngASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, udtNCB.ncb_length)
  strOut = ""
  If lngASTAT Then
    udtNCB.ncb_buffer = lngASTAT
    bytResponse = Netbios(udtNCB)
    CopyMemory udtASTAT, udtNCB.ncb_buffer, Len(udtASTAT)
     With udtASTAT.adapt
      For X = 0 To 5
        strOut = strOut & Right$("00" & Hex$(.adapter_address(X)), 2)
      Next X
    End With
    HeapFree GetProcessHeap(), 0, lngASTAT
  End If
  EthernetAddress = strOut
End Function