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Get you IP Address

This code will retrieve either your host name or ip address.

API Declarations
uses wsock32.dll

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(5(5 Vote))

'use GetIPAddress and GetIPHostName
Option Explicit
Public Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128
Public Const ERROR_SUCCESS As Long = 0
Public Const WS_VERSION_REQD As Long = &H101
Public Const WS_VERSION_MAJOR As Long = WS_VERSION_REQD \ &H100 And &HFF&
Public Const WS_VERSION_MINOR As Long = WS_VERSION_REQD And &HFF&
Public Const MIN_SOCKETS_REQD As Long = 1
Public Const SOCKET_ERROR As Long = -1
Public Type HOSTENT
 hName As Long
 hAliases As Long
 hAddrType As Integer
 hLen As Integer
 hAddrList As Long
End Type
Public Type WSADATA
 wVersion As Integer
 wHighVersion As Integer
 szDescription(0 To MAX_WSADescription) As Byte
 szSystemStatus(0 To MAX_WSASYSStatus) As Byte
 wMaxSockets As Integer
 wMaxUDPDG As Integer
 dwVendorInfo As Long
End Type
Public Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
Public Declare Function WSAStartup Lib "WSOCK32.DLL" _
(ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Public Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long
Public Declare Function gethostname Lib "WSOCK32.DLL" _
(ByVal szHost As String, ByVal dwHostLen As Long) As Long
Public Declare Function gethostbyname Lib "WSOCK32.DLL" _
(ByVal szHost As String) As Long
Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
(hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Public Function GetIPAddress() As String
Dim sHostName As String * 256
Dim lpHost As Long
Dim HOST As HOSTENT
Dim dwIPAddr As Long
Dim tmpIPAddr() As Byte
Dim i As Integer
Dim sIPAddr As String
If Not SocketsInitialize() Then
 GetIPAddress = ""
 Exit Function
End If
If gethostname(sHostName, 256) = SOCKET_ERROR Then
 GetIPAddress = ""
 MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & _
 " has occurred. Unable to successfully get Host Name."
 SocketsCleanup
 Exit Function
End If
sHostName = Trim$(sHostName)
lpHost = gethostbyname(sHostName)
If lpHost = 0 Then
 GetIPAddress = ""
 MsgBox "Windows Sockets are not responding. " & _
 "Unable to successfully get Host Name."
 SocketsCleanup
 Exit Function
End If
CopyMemory HOST, lpHost, Len(HOST)
CopyMemory dwIPAddr, HOST.hAddrList, 4
ReDim tmpIPAddr(1 To HOST.hLen)
CopyMemory tmpIPAddr(1), dwIPAddr, HOST.hLen
For i = 1 To HOST.hLen
sIPAddr = sIPAddr & tmpIPAddr(i) & "."
Next
GetIPAddress = Mid$(sIPAddr, 1, Len(sIPAddr) - 1)
SocketsCleanup
End Function
Public Function GetIPHostName() As String
Dim sHostName As String * 256
If Not SocketsInitialize() Then
 GetIPHostName = ""
 Exit Function
End If
If gethostname(sHostName, 256) = SOCKET_ERROR Then
 GetIPHostName = ""
 MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & _
 " has occurred. Unable to successfully get Host Name."
 SocketsCleanup
 Exit Function
End If
GetIPHostName = Left$(sHostName, InStr(sHostName, Chr(0)) - 1)
SocketsCleanup
End Function
Public Function HiByte(ByVal wParam As Integer)
HiByte = wParam \ &H100 And &HFF&
End Function
Public Function LoByte(ByVal wParam As Integer)
LoByte = wParam And &HFF&
End Function

Public Sub SocketsCleanup()
If WSACleanup() <> ERROR_SUCCESS Then
 MsgBox "Socket error occurred in Cleanup."
End If
End Sub

Public Function SocketsInitialize() As Boolean
Dim WSAD As WSADATA
Dim sLoByte As String
Dim sHiByte As String
If WSAStartup(WS_VERSION_REQD, WSAD) <> ERROR_SUCCESS Then
 MsgBox "The 32-bit Windows Socket is not responding."
 SocketsInitialize = False
 Exit Function
End If
If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
 MsgBox "This application requires a minimum of " & _
 CStr(MIN_SOCKETS_REQD) & " supported sockets."
 SocketsInitialize = False
 Exit Function
End If
If LoByte(WSAD.wVersion) < WS_VERSION_MAJOR Or _
(LoByte(WSAD.wVersion) = WS_VERSION_MAJOR And _
HiByte(WSAD.wVersion) < WS_VERSION_MINOR) Then
 sHiByte = CStr(HiByte(WSAD.wVersion))
 sLoByte = CStr(LoByte(WSAD.wVersion))
 MsgBox "Sockets version " & sLoByte & "." & sHiByte & _
 " is not supported by 32-bit Windows Sockets."
 SocketsInitialize = False
 Exit Function
End If
'must be OK, so lets do it
SocketsInitialize = True
End Function