How to retrieve this computer's IP address? - vba

Question

What is the least cumbersome (module-inclusion, code lenght, etc) way to retrieve the machine IP address (of the first interface open)?
I know of some solutions using MSINET, but I believe we can do better.
Don't reply
Function HomeIP() as Atring
HomeIP= "127.0.0.1"
End Function
because it's not that funny... or correct.
The scenario is a question wiht a document ID feature I'm trying to build a reply for.

Answer 1

Here's an adapted example from Technet:
Function GetIPAddress()
Const strComputer As String = "." ' Computer name. Dot means local computer
Dim objWMIService, IPConfigSet, IPConfig, IPAddress, i
Dim strIPAddress As String
' Connect to the WMI service
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
' Get all TCP/IP-enabled network adapters
Set IPConfigSet = objWMIService.ExecQuery _
("Select * from Win32_NetworkAdapterConfiguration Where IPEnabled=TRUE")
' Get all IP addresses associated with these adapters
For Each IPConfig In IPConfigSet
IPAddress = IPConfig.IPAddress
If Not IsNull(IPAddress) Then
strIPAddress = strIPAddress & Join(IPAddress, ", ")
End If
Next
GetIPAddress = strIPAddress
End Function
It requires that you have Microsoft WMI Scripting Library in the project's references.

Answer 2

A couple of examples I found:-
http://www.everythingaccess.com/tutorials.asp?ID=Get-all-IP-Addresses-of-your-machine
http://puremis.net/excel/code/079.shtml
EDIT
Here is the code from the first link with slight modification
Option Explicit
' VBA MODULE: Get all IP Addresses of your machine
' (c) 2005 Wayne Phillips (http://www.everythingaccess.com)
' Written 18/05/2005
'
' REQUIREMENTS: Windows 98 or above, Access 97 and above
'
' Please read the full tutorial here:
' http://www.everythingaccess.com/tutorials.asp?ID=Get-all-IP-Addresses-of-your-machine
'
' Please leave the copyright notices in place.
' Thank you.
'
'Option Compare Database
'A couple of API functions we need in order to query the IP addresses in this machine
Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Public Declare Function GetIpAddrTable Lib "Iphlpapi" (pIPAdrTable As Byte, pdwSize As Long, ByVal Sort As Long) As Long
'The structures returned by the API call GetIpAddrTable...
Type IPINFO
dwAddr As Long ' IP address
dwIndex As Long ' interface index
dwMask As Long ' subnet mask
dwBCastAddr As Long ' broadcast address
dwReasmSize As Long ' assembly size
Reserved1 As Integer
Reserved2 As Integer
End Type
Public Function ConvertIPAddressToString(longAddr As Long) As String
Dim IPBytes(3) As Byte
Dim lngCount As Long
'Converts a long IP Address to a string formatted 255.255.255.255
'Note: Could use inet_ntoa instead
CopyMemory IPBytes(0), longAddr, 4 ' IP Address is stored in four bytes (255.255.255.255)
'Convert the 4 byte values to a formatted string
While lngCount < 4
ConvertIPAddressToString = ConvertIPAddressToString + _
CStr(IPBytes(lngCount)) + _
IIf(lngCount < 3, ".", "")
lngCount = lngCount + 1
Wend
End Function
Public Function GetFirstNonLocalIPAddress()
Dim Ret As Long, Tel As Long
Dim bytBuffer() As Byte
Dim IPTableRow As IPINFO
Dim lngCount As Long
Dim lngBufferRequired As Long
Dim lngStructSize As Long
Dim lngNumIPAddresses As Long
Dim strIPAddress As String
On Error GoTo ErrorHandler:
Call GetIpAddrTable(ByVal 0&, lngBufferRequired, 1)
If lngBufferRequired > 0 Then
ReDim bytBuffer(0 To lngBufferRequired - 1) As Byte
If GetIpAddrTable(bytBuffer(0), lngBufferRequired, 1) = 0 Then
'We've successfully obtained the IP Address details...
'How big is each structure row?...
lngStructSize = LenB(IPTableRow)
'First 4 bytes is a long indicating the number of entries in the table
CopyMemory lngNumIPAddresses, bytBuffer(0), 4
While lngCount < lngNumIPAddresses
'bytBuffer contains the IPINFO structures (after initial 4 byte long)
CopyMemory IPTableRow, _
bytBuffer(4 + (lngCount * lngStructSize)), _
lngStructSize
strIPAddress = ConvertIPAddressToString(IPTableRow.dwAddr)
If Not ((strIPAddress = "127.0.0.1")) Then
GetFirstNonLocalIPAddress = strIPAddress
Exit Function
End If
lngCount = lngCount + 1
Wend
End If
End If
Exit Function
ErrorHandler:
MsgBox "An error has occured in GetIPAddresses():" & vbCrLf & vbCrLf & _
Err.Description & " (" & CStr(Err.Number) & ")"
End Function

Answer 3

You could execute the shell command ipconfig and parse the returned results?

Answer 4

There is another easy way using ipconfig.
http://www.vbaexpress.com/kb/getarticle.php?kb_id=537

Answer 5

Codeproject has a good article on how to do this with .net:
http://www.codeproject.com/KB/cs/network.aspx
You could always create a console executable out of this, and call it from VBA.
RO

Answer 6

nbtstat -n might do the job on XP anyway. Not sure about other Windows versions or about localisation in other languages. Partial sample output:
C:\Documents and
Settings\colin>nbtstat -n
Local Area Connection: Node IpAddress:
[192.168.1.100] Scope Id: []
NetBIOS Local Name Table
etc.

Answer 7

Option Explicit
Sub Main()
Dim wsh As Object
Dim strIPOutputFile As String, strSingleLine As String, strIP As String, strToFind As String
Dim intSourceFile As Integer, intLocation As Integer
Set wsh = CreateObject("WScript.Shell")
strIPOutputFile = "C:\Users\MeMeMeMe\Desktop\txtfile.txt"
'Save ipconfig info to file
wsh.Run "%comspec% /c ipconfig/all> """ & strIPOutputFile & """
'Close any open text files
Close
'Get the number of the next free text file
intSourceFile = FreeFile
Open strIPOutputFile For Input As intSourceFile
strToFind = "IPv4 Address. . . . . . . . . . . :" 'This will probably depend on your file
Do Until EOF(intSourceFile)
Input #intSourceFile, strSingleLine
If InStr(1, strSingleLine, strToFind) > 0 Then
Exit Do
End If
Loop
intLocation = Len(strToFind)
strIP = Trim(Mid(strSingleLine,1 + intLocation,Len(strSingleLine) - intLocation))
intLocation = Len(strIP)
While Not IsNumeric(Mid(strIP,intLocation,1))
strIP = Left(strIP, Len(strIP) - 1)
intLocation = Len(strIP)
Wend
Close
MsgBox strIP
End Sub