Récupérer l'adresse ip du pc (simple)

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Une fonction qui renvoie l'adresse IP du pc, j'ai essayé de commenter le plus possible tout en laissant le code lisible.

Source / Exemple :

Private Declare Function WSAStartup Lib "wsock32" (ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Private Declare Function WSACleanup Lib "wsock32" () As Long
Private Declare Function gethostname Lib "wsock32" (ByVal szHost As String, ByVal dwHostLen As Long) As Long
Private Declare Function gethostbyname Lib "wsock32" (ByVal HostName As String) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (xDest As Any, xSource As Any, ByVal nBytes As Long)
Private Const MAX_WSADescription As Long = 256
Private Const MAX_WSASYSStatus As Long = 128
Private Const WS_VERSION_REQD     As Long = &H101
Private Const IP_SUCCESS As Long = 0
Private Const SOCKET_ERROR As Long = -1
Private Const NO_ERROR = 0
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 Type Hostent
   hName      As Long
   hAliases   As Long
   hAddrType  As Integer
   hLen       As Integer
   hAddrList  As Long
End Type

' Renvoie l'adresse IP
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
    ' Si GetHostName ne marche pas
    If gethostname(sHostName, 256) = SOCKET_ERROR Then
        GetIPAddress = ""
        Call SocketsCleanup
        Exit Function
    End If
    sHostName = Trim$(sHostName)
    lpHost = gethostbyname(sHostName)
    ' Si l'adresse récupérée est vide
    If lpHost = 0 Then
        GetIPAddress = ""
        Call SocketsCleanup
        Exit Function
    End If
    ' On formate l'adresse pour qu'elle soit de la forme xxx.xxx.xxx.xxx
    CopyMemory HOST, ByVal lpHost, Len(HOST)
    CopyMemory dwIPAddr, ByVal HOST.hAddrList, 4
    ReDim tmpIPAddr(1 To HOST.hLen)
    CopyMemory tmpIPAddr(1), ByVal dwIPAddr, HOST.hLen
    For i = 1 To HOST.hLen
        sIPAddr = sIPAddr & tmpIPAddr(i) & "."
    Next
    ' On renvoie la valeur
    GetIPAddress = Mid$(sIPAddr, 1, Len(sIPAddr) - 1)
    Call SocketsCleanup
End Function

' Vide le socket
Public Function SocketsCleanup()
    SocketsCleanup = IIf(WSACleanup() = 0, True, False)
End Function

' Initialise le socket
Public Function SocketsInitialize() As Boolean
    Dim WSAD As WSADATA
    SocketsInitialize = WSAStartup(WS_VERSION_REQD, WSAD) = IP_SUCCESS
End Function