再问一下：怎样获得本机在Internet上的IP地址。

To a form add a command button (Command1), and two list boxes to the form (List1 / List2).  Add the following to the form:

Option Explicit
Private Sub Form_Load()
   ReDim TabArray(0 To 0) As Long
   TabArray(0) = 61
  'clear existing tabs and
  'set the list tabstops
   Call SendMessage(List2.hwnd, LB_SETTABSTOPS, 0&, ByVal 0&)
   Call SendMessage(List2.hwnd, LB_SETTABSTOPS, 1&, TabArray(0))
   List2.Refresh

  'initialize winsock and load adapter data
   SocketsInitialize
   DisplayAdatersInfo

   With Command1
      .Enabled = List1.ListIndex > -1
      .Caption = "Release IP"
   End With

   With Command2
      .Enabled = List1.ListIndex > -1
      .Caption = "Renew IP"
   End With

End SubPrivate Sub Form_Unload(Cancel As Integer)
    SocketsCleanup
End SubPrivate Sub Command1_Click()

   Dim ip_index As Long

   ip_index = CLng(List1.List(List1.ListIndex))

  'assure an adapter index has been selected
   If ip_index <> 0 Then

      Screen.MousePointer = vbHourglass

     'release the IP for the selected adapter
      If IPRelease(ip_index) Then
      DisplayAdatersInfo
      End If
      Screen.MousePointer = vbDefault
   End If
End Sub
Private Sub Command2_Click()
   Dim ip_index As Long

   ip_index = CLng(List1.List(List1.ListIndex))

  'assure an adapter index has been selected
   If ip_index <> 0 Then

      Screen.MousePointer = vbHourglass

     'release the IP for the selected adapter
      If IPRenew(ip_index) Then
         DisplayAdatersInfo
      End If
      Screen.MousePointer = vbDefault
   End If
End SubPrivate Sub List1_Click()   Command1.Enabled = List1.ListIndex > -1
   Command2.Enabled = List1.ListIndex > -1End SubPrivate Sub List1_MouseDown(Button As Integer, Shift As Integer, _
                            X As Single, Y As Single)List2.ListIndex = List1.ListIndex
End SubPrivate Sub List2_MouseDown(Button As Integer, Shift As Integer, _
                            X As Single, Y As Single)
List1.ListIndex = List2.ListIndex
End SubSub DisplayAdatersInfo()  'populates two listboxes with adapter info  'working vars
   Dim buff()      As Byte
   Dim cbRequired  As Long
   Dim Adapter     As IP_ADAPTER_INFO
   Dim ptr1        As Long

  'clear the lists
   List1.Clear
   List2.Clear

   Call GetAdaptersInfo(ByVal 0&, cbRequired)   If cbRequired > 0 Then

      ReDim buff(0 To cbRequired - 1) As Byte

      If GetAdaptersInfo(buff(0), cbRequired) = ERROR_SUCCESS Then

         ptr1 = VarPtr(buff(0))

        'ptr1 is 0 when no more adapters
         Do While (ptr1 <> 0)
         CopyMemory Adapter, ByVal ptr1, LenB(Adapter)

            With Adapter
               List1.AddItem .dwIndex
               List2.AddItem TrimNull(StrConv(.IpAddressList.IpAddress.IpAddr, vbUnicode)) _
                             & vbTab & _
                             TrimNull(StrConv(.sDescription, vbUnicode))

               ptr1 = .dwNext

            End With  'With Adapter

         Loop  'Do While (ptr1 <> 0)

      End If
   End IfEnd SubPrivate Function TrimNull(item As String)    Dim pos As Integer

   'double check that there is a chr$(0) in the string
    pos = InStr(item, Chr$(0))
    If pos Then
          TrimNull = Left$(item, pos - 1)
    Else: TrimNull = item
    End If

End Function

也可以使用
Public Declare Function gethostbyname lib "WSOCK32.DLL" (ByVal hotname$) as long
-----------------------
host_addr = gethostbyname(yourcomputername)

在MSDOS中输入
ipconfig
即可

感谢您使用微软产品。您可以使用Windows Sockets的API函数GetHostByName通过本机的Host Name获得包含本机ip地址的Sockets信息，为了获得本机的标准Host Name，您还需要调用API函数GetHostName。以下链接提供了详细的示例代码。
Q160215 HOWTO: Obtain the Host IP Address Using Windows Sockets
http://support.microsoft.com/support/kb/articles/q160/2/15.asp
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'在模块中
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
'在Form中
Private Const WS_VERSION_REQD = &H101
   Private Const WS_VERSION_MAJOR = WS_VERSION_REQD \ &H100 And &HFF&
   Private Const WS_VERSION_MINOR = WS_VERSION_REQD And &HFF&
   Private Const MIN_SOCKETS_REQD = 1
   Private Const SOCKET_ERROR = -1
   Private Const WSADescription_Len = 256
   Private Const WSASYS_Status_Len = 128   Private Type HOSTENT
       hName As Long
       hAliases As Long
       hAddrType As Integer
       hLength As Integer
       hAddrList As Long
   End Type   Private Type WSADATA
       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 Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
   Private Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal _
   wVersionRequired As Integer, lpWSAData As WSADATA) As Long
   Private Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long

   Private Declare Function gethostname Lib "WSOCK32.DLL" (ByVal hostname$, ByVal HostLen As Long) As Long
   Private Declare Function gethostbyname Lib "WSOCK32.DLL" (ByVal hostname$) As Long
   Private Declare Sub RtlMoveMemory Lib "KERNEL32" (hpvDest As Any, ByVal hpvSource&, ByVal cbCopy&)   Function hibyte(ByVal wParam As Integer)       hibyte = wParam \ &H100 And &HFF&   End Function   Function lobyte(ByVal wParam As Integer)       lobyte = wParam And &HFF&   End Function   Sub SocketsInitialize()
   Dim WSAD As WSADATA
   Dim iReturn As Integer
   Dim sLowByte As String, sHighByte As String, sMsg As String       iReturn = WSAStartup(WS_VERSION_REQD, WSAD)       If iReturn <> 0 Then
           MsgBox "Winsock.dll is not responding."
           End
       End If       If lobyte(WSAD.wversion) < WS_VERSION_MAJOR Or (lobyte(WSAD.wversion) = _
           WS_VERSION_MAJOR And hibyte(WSAD.wversion) < WS_VERSION_MINOR) Then           sHighByte = Trim$(Str$(hibyte(WSAD.wversion)))
           sLowByte = Trim$(Str$(lobyte(WSAD.wversion)))
           sMsg = "Windows Sockets version " & sLowByte & "." & sHighByte
           sMsg = sMsg & " is not supported by winsock.dll "
           MsgBox sMsg
           End
       End If       'iMaxSockets is not used in winsock 2. So the following check is only
       'necessary for winsock 1. If winsock 2 is requested,
       'the following check can be skipped.       If WSAD.iMaxSockets < MIN_SOCKETS_REQD Then
           sMsg = "This application requires a minimum of "
           sMsg = sMsg & Trim$(Str$(MIN_SOCKETS_REQD)) & " supported sockets."
           MsgBox sMsg
           End
       End If   End Sub   Sub SocketsCleanup()
   Dim lReturn As Long       lReturn = WSACleanup()       If lReturn <> 0 Then
           MsgBox "Socket error " & Trim$(Str$(lReturn)) & " occurred in Cleanup "
           End
       End If   End Sub   Sub Form_Load()       SocketsInitialize   End Sub   Private Sub Form_Unload(Cancel As Integer)       SocketsCleanup   End Sub   Private Sub Command1_click()
   Dim hostname As String * 256
   Dim hostent_addr As Long
   Dim host As HOSTENT
   Dim hostip_addr As Long
   Dim temp_ip_address() As Byte
   Dim i As Integer
   Dim ip_address As String

       If gethostname(hostname, 256) = SOCKET_ERROR Then
           MsgBox "Windows Sockets error " & Str(WSAGetLastError())
           Exit Sub
       Else
           hostname = Trim$(hostname)
       End If
       hostent_addr = gethostbyname(hostname)       If hostent_addr = 0 Then
           MsgBox "Winsock.dll is not responding."
           Exit Sub
       End If       RtlMoveMemory host, hostent_addr, LenB(host)
       RtlMoveMemory hostip_addr, host.hAddrList, 4       MsgBox hostname       'get all of the IP address if machine is  multi-homed       Do
           ReDim temp_ip_address(1 To host.hLength)
           RtlMoveMemory temp_ip_address(1), hostip_addr, host.hLength           For i = 1 To host.hLength
               ip_address = ip_address & temp_ip_address(i) & "."
           Next
           ip_address = Mid$(ip_address, 1, Len(ip_address) - 1)           MsgBox ip_address           ip_address = ""
           host.hAddrList = host.hAddrList + LenB(host.hAddrList)
           RtlMoveMemory hostip_addr, host.hAddrList, 4
        Loop While (hostip_addr <> 0)
   End Sub

siwaxige(papa)
的回答很好，帮了我大忙，谢谢，应该给分。

调试易

再问一下：怎样获得本机在Internet上的IP地址。

解决方案 »