通过计算机名查找出它的IP地址

这是 API-Guid 中的例子，其中 gethostbyname 部分
'In a form
Private Sub Form_Load()
    'KPD-Team 1999
    'URL: http://www.allapi.net/
    'E-Mail: [email protected]
    MsgBox "IP-address: " + GetIPAddress
End Sub
'In a module
Public Const MIN_SOCKETS_REQD As Long = 1
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 SOCKET_ERROR As Long = -1
Public Const WSADESCRIPTION_LEN = 257
Public Const WSASYS_STATUS_LEN = 129
Public Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128
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
Type WSADataInfo
    wVersion As Integer
    wHighVersion As Integer
    szDescription As String * WSADESCRIPTION_LEN
    szSystemStatus As String * WSASYS_STATUS_LEN
    iMaxSockets As Integer
    iMaxUdpDg As Integer
    lpVendorInfo As String
End Type
Public Type HOSTENT
    hName As Long
    hAliases As Long
    hAddrType As Integer
    hLen As Integer
    hAddrList As Long
End Type
Declare Function WSAStartupInfo Lib "WSOCK32" Alias "WSAStartup" (ByVal wVersionRequested As Integer, lpWSADATA As WSADataInfo) As Long
Declare Function WSACleanup Lib "WSOCK32" () As Long
Declare Function WSAGetLastError Lib "WSOCK32" () As Long
Declare Function WSAStartup Lib "WSOCK32" (ByVal wVersionRequired As Long, lpWSADATA As WSAData) As Long
Declare Function gethostname Lib "WSOCK32" (ByVal szHost As String, ByVal dwHostLen As Long) As Long
Declare Function gethostbyname Lib "WSOCK32" (ByVal szHost As String) As Long
Declare Sub CopyMemoryIP 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
    CopyMemoryIP HOST, lpHost, Len(HOST)
    CopyMemoryIP dwIPAddr, HOST.hAddrList, 4
    ReDim tmpIPAddr(1 To HOST.hLen)
    CopyMemoryIP 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
哈哈...刚刚整理好代码,却慢了一步! 有先发了!不过,都整理好了,还是发一下哈! (代码差不多,方法相同的...)'模块代码Private Const WS_VERSION_REQD = &H101
Private Const WS_VERSION_MAJOR = WS_VERSION_REQD And &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 = 128Private Type HOSTENT
   hname As Long
   hAliases As Long
   hAddrType As Integer
   hLength As Integer
   hAddrList As Long
End TypePrivate 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 gethostbyaddr Lib "WSOCK32.DLL" (addr As Any, ByVal _
byteslen As Integer, addrtype As Integer) As Long
Private Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
Private Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal _
        wVersionRequired&, lpWSAData As WSADATA) As Long
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () 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)    '注释：获得整数的高位
   hibyte = wParam And &H100 And &HFF&
End FunctionFunction lobyte(ByVal wParam As Integer)    '注释：获得整数的低位
   lobyte = wParam And &HFF&
End FunctionPublic Function IPSocketsInitialize()
   Dim WSAD As WSADATA
   Dim iReturn As Integer
   iReturn = WSAStartup(WS_VERSION_REQD, WSAD)

   Dim sLowByte As String, sHighByte As String, sMsg As String

   iReturn = WSAStartup(WS_VERSION_REQD, WSAD)

   If iReturn <> 0 Then
      MsgBox "Winsock.dll 没有反应."
      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版本 " & sLowByte & "." & sHighByte
      sMsg = sMsg & " 不被winsock.dll支持 "
      MsgBox sMsg
      End
   End If

   If WSAD.iMaxSockets < MIN_SOCKETS_REQD Then
      sMsg = "这个系统需要的最少Sockets数为 "
      sMsg = sMsg & Trim$(str$(MIN_SOCKETS_REQD))
      MsgBox sMsg
      End
   End If

End FunctionPublic Sub SocketsCleanup()
   Dim lReturn As Long

   lReturn = WSACleanup()

   If lReturn <> 0 Then
      MsgBox "Socket错误 " & Trim$(str$(lReturn)) & " occurred in Cleanup "
      End
   End If
End SubPublic Function GetIP(name As String) As String
   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

   hostent_addr = gethostbyname(name)

   If hostent_addr = 0 Then
      GetIP = ""                     '注释：主机名不能被解释
      Exit Function
   End If

   RtlMoveMemory host, hostent_addr, LenB(host)
   RtlMoveMemory hostip_addr, host.hAddrList, 4

   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)

   GetIP = ip_addressEnd FunctionPrivate Function getname(addrstr As String) As String
    Dim hostent_addr As Long
    Dim host As HOSTENT
    Dim addr(0 To 50) As Byte
    Dim addrs As String
    Dim hname(1 To 50) As Byte
    Dim str As String
    Dim I As Integer, j As Integer
    Dim temp_int As Integer
    Dim byt As Byte
    str = Trim$(addrstr)
    I = 0
    j = 0
    Do
        temp_int = 0
        I = I + 1
        Do While Mid$(str, I, 1) >= "0" And Mid$(str, I, 1) <= "9" And I <= Len(str)
            temp_int = temp_int * 10 + Mid$(str, I, 1)
            I = I + 1
        Loop
        If temp_int <= 255 Then
            addr(j) = temp_int
            j = j + 1
        End If

    Loop Until Mid$(str, I, 1) <> "." Or I > Len(str) Or temp_int > 255
    If temp_int > 255 Then
        getname = "地址非法"
        Exit Function
    End If
    hostent_addr = gethostbyaddr(addr(0), j, 2)
    If hostent_addr = 0 Then
        getname = "此地址无法解析"
        Exit Function
    End If
    RtlMoveMemory host, hostent_addr, LenB(host)
    RtlMoveMemory hname(1), host.hname, 50
    j = 51
    For I = 1 To 50
        If hname(I) = 0 Then
            j = I
        End If
        If I >= j Then
            hname(I) = 32
        End If
    Next I
    getname = Trim$(StrConv(hname, vbUnicode))
End Function
'窗体代码
Private Sub Command1_Click()
    Text1.Text = GetIP("www.vssky.org") 'Text1.Text = GetIP("vsnb")
End SubPrivate Sub Form_Load()
    Call IPSocketsInitialize
End Sub这方法,可以获取外网域名和内网计算机名的对应的IP

调试易

通过计算机名查找出它的IP地址

解决方案 »