Startseite / Tipps / VB 5/6-Tipp 0378: Eigene IPs schnell auslesen III

VB 5/6-Tipp 0378: Eigene IPs schnell auslesen III

 von ActiveVB

'Dieser Quellcode stammt von http://www.activevb.de
'und kann frei verwendet werden. Für eventuelle Schäden
'wird nicht gehaftet.

'Um Fehler oder Fragen zu klären, nutzen Sie bitte unser Forum.
'Ansonsten viel Spaß und Erfolg mit diesem Source!

'------------- Anfang Projektdatei Project1.vbp -------------
'--------- Anfang Formular "Form1" alias Form1.frm  ---------
' Steuerelement: Listen-Steuerelement "List1"
' Steuerelement: Beschriftungsfeld "Label1"

Option Explicit
      
Private Declare Function WSAGetLastError Lib "WSOCK32.DLL" () _
        As Long
        
Private Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal _
        wVersionRequired As Long, lpWSAData As WinSocketDataType) _
        As Long
        
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () _
        As Long
        
Private Declare Function gethostname Lib "WSOCK32.DLL" (ByVal _
        HostName As String, ByVal HostLen As Integer) As Long
        
Private Declare Function gethostbyname Lib "WSOCK32.DLL" _
        (ByVal HostName As String) As Long
        
Private Declare Function gethostbyaddr Lib "WSOCK32.DLL" _
        (ByVal addr As String, ByVal laenge As Integer, _
        ByVal typ As Integer) As Long
        
Private Declare Sub RtlMoveMemory Lib "kernel32" (hpvDest As _
        Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
       
Private Type HostDeType
    hName As Long
    hAliases As Long
    hAddrType As Integer
    hLength As Integer
    hAddrList As Long
End Type

Const WS_VERSION_REQD As Long = &H101&
Const MIN_SOCKETS_REQD As Long = 1&
Const SOCKET_ERROR As Long = -1&
Const WSADescription_Len As Long = 256&
Const WSASYS_Status_Len As Long = 128&

Private Type WinSocketDataType
    wversion As Integer
    wHighVersion As Integer
    szDescription(0 To WSADescription_Len) As Byte
    szSystemStatus(0 To WSASYS_Status_Len) As Byte
    iMaxSockets As Integer
    iMaxUdpDg As Integer
    lpszVendorInfo As Long
End Type

Private Sub GetIPs()
    Dim IP As String, Host As String
    Dim x As Integer
    
    Call InitSocketAPI
    Host = MyHostName
    List1.Clear
    
    Do
        IP = HostByName(Host, x)
        If Len(IP) <> 0 Then List1.AddItem IP
        x = x + 1
    Loop While Len(IP) > 0
    
    Call CleanSockets
End Sub

Private Sub InitSocketAPI()
    Dim Result As Integer
    Dim SocketData As WinSocketDataType
  
    Result = WSAStartup(WS_VERSION_REQD, SocketData)
    If Result <> 0 Then
        Call MsgBox("'winsock.dll' antwortet nicht !")
        End
    End If
End Sub

Private Function MyHostName() As String
    Dim HostName As String * 256
  
    If gethostname(HostName, 256) = SOCKET_ERROR Then
        MsgBox "Windows Sockets error " & Str(WSAGetLastError())
        Exit Function
    Else
        MyHostName = NextChar(Trim$(HostName), Chr$(0))
    End If
End Function

Private Function HostByName(Name As String, Optional x As Integer = 0) As String
    Dim MemIp() As Byte
    Dim y As Integer
    Dim HostDeAddress As Long, HostIp As Long
    Dim IpAddress As String
    Dim Host As HostDeType
  
    HostDeAddress = gethostbyname(Name)
    If HostDeAddress = 0 Then
        HostByName = ""
        Exit Function
    End If
    
    Call RtlMoveMemory(Host, HostDeAddress, LenB(Host))
    
    For y = 0 To x
        Call RtlMoveMemory(HostIp, Host.hAddrList + 4 * y, 4)
        If HostIp = 0 Then
            HostByName = ""
            Exit Function
        End If
    Next y
    
    ReDim MemIp(1 To Host.hLength)
    Call RtlMoveMemory(MemIp(1), HostIp, Host.hLength)
    
    IpAddress = ""
    
    For y = 1 To Host.hLength
        IpAddress = IpAddress & MemIp(y) & "."
    Next y
    
    IpAddress = Left$(IpAddress, Len(IpAddress) - 1)
    HostByName = IpAddress
End Function

Private Sub CleanSockets()
    Dim Result As Long
    
    Result = WSACleanup()
    If Result <> 0 Then
        Call MsgBox("Socket Error " & Trim$(Str$(Result)) & _
                      " in Prozedur 'CleanSockets' aufgetreten !")
        
        End
    End If
End Sub

Private Function NextChar(Text As String, Char As String) As String
    Dim pos As Integer
    
    pos = InStr(1, Text, Char)
    If pos = 0 Then
        NextChar = Text
        Text = ""
    Else
        NextChar = Left$(Text, pos - 1)
        Text = Mid$(Text, pos + Len(Char))
    End If
End Function

Private Sub Form_Load()
    Call GetIPs
End Sub
'---------- Ende Formular "Form1" alias Form1.frm  ----------
'-------------- Ende Projektdatei Project1.vbp --------------

Tipp-Kompatibilität:

Windows/VB-Version	Win32s	Win95	Win98	WinME	WinNT4	Win2000	WinXP
VB4
VB5
VB6

Hat dieser Tipp auf Ihrem Betriebsystem und mit Ihrer VB-Version funktioniert?

Ja, funktioniert!

Nein, funktioniert nicht bei mir!

VB-Version: VB6 VB5 VB4

Windows-Version: Windows XP Windows 2000 Windows NT4 Windows Me Windows 98 Windows 95 Win32s

Archivierte Nutzerkommentare 

Klicken Sie diesen Text an, wenn Sie die 11 archivierten Kommentare ansehen möchten.
Diese stammen noch von der Zeit, als es noch keine direkte Forenunterstützung für Fragen und Kommentare zu einzelnen Artikeln gab.
Aus Gründen der Vollständigkeit können Sie sich die ausgeblendeten Kommentare zu diesem Artikel aber gerne weiterhin ansehen.

Function GetmyIP() As String
Dim WinSock
  On Error Resume Next
  Set WinSock = CreateObject("MSWinSock.WinSock")
  GetmyIP = WinSock.LocalIP
End Function

Winsock1.LocalIP