如何得到域名的IP

'Example Name: How to Resolve a Hostname Into an IP Address'------------------------------------------------------------------------------
'
' BAS Moduel Code
'
'------------------------------------------------------------------------------ Option ExplicitPublic Const IP_SUCCESS As Long = 0
Public Const MAX_WSADescription As Long = 256
Public Const MAX_WSASYSStatus As Long = 128
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 = -1Public Type WSADATA
   wVersion As Integer
   wHighVersion As Integer
   szDescription(0 To MAX_WSADescription) As Byte
   szSystemStatus(0 To MAX_WSASYSStatus) As Byte
   wMaxSockets As Long
   wMaxUDPDG As Long
   dwVendorInfo As Long
End TypePrivate 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 Declare Function lstrlenA Lib "kernel32" _
  (lpString As Any) As LongPublic Declare Function WSAStartup Lib "wsock32" _
   (ByVal wVersionRequired As Long, _
    lpWSADATA As WSADATA) As Long

Public Declare Function WSACleanup Lib "wsock32" () As Long
Public Function SocketsInitialize() As Boolean   Dim WSAD As WSADATA
   Dim success As Long

   SocketsInitialize = WSAStartup(WS_VERSION_REQD, WSAD) = IP_SUCCESS

End Function
Public Sub SocketsCleanup()

   If WSACleanup() <> 0 Then
       MsgBox "Windows Sockets error occurred in Cleanup.", vbExclamation
   End If

End Sub
Public Function GetIPFromHostName(ByVal sHostName As String) As String  'converts a host name to an IP address.   Dim nbytes As Long
   Dim ptrHosent As Long
   Dim ptrName As Long
   Dim ptrAddress As Long
   Dim ptrIPAddress As Long
   Dim sAddress As String

   sAddress = Space$(4)   ptrHosent = gethostbyname(sHostName & vbNullChar)   If ptrHosent <> 0 Then      ptrAddress = ptrHosent + 12

     'get the IP address
      CopyMemory ptrAddress, ByVal ptrAddress, 4
      CopyMemory ptrIPAddress, ByVal ptrAddress, 4
      CopyMemory ByVal sAddress, ByVal ptrIPAddress, 4      GetIPFromHostName = IPToText(sAddress)   End If

End Function
Private Function IPToText(ByVal IPAddress As String) As String   IPToText = CStr(Asc(IPAddress)) & "." & _
              CStr(Asc(Mid$(IPAddress, 2, 1))) & "." & _
              CStr(Asc(Mid$(IPAddress, 3, 1))) & "." & _
              CStr(Asc(Mid$(IPAddress, 4, 1)))

End Function
'--end block--'

'------------------------------------------------------------------------------
'
' Form Code
'
'------------------------------------------------------------------------------

Private Sub Command1_Click()   Dim sHostName As String

   If SocketsInitialize() Then

     'pass the host address to the function
      sHostName = Text1.Text
      Text2.Text = GetIPFromHostName(sHostName)

      SocketsCleanup

   Else

        MsgBox "Windows Sockets for 32 bit Windows " & _
               "is not successfully responding."

   End If

End Sub

vb 里怎么用 Ping 啊 ?能给出代码么？谢谢

Option ExplicitConst SYNCHRONIZE = &H100000
Const INFINITE = &HFFFF
Const WAIT_OBJECT_0 = 0
Const WAIT_TIMEOUT = &H102Private Declare Function SendMessage Lib "User32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As LongPrivate Sub cmdClear_Click()
    txtIP.Text = ""
    txtNumber.Text = ""
    Open "C:\log.txt" For Output As #1
    Close #1
    txtOutPut.Text = ""
End SubPrivate Sub cmdPing_Click()
Dim ShellX As String
Dim lPid As Long
Dim lHnd As Long
Dim lRet As Long
Dim VarX As String  frmMain.MousePointer = 11
  If txtIP.Text <> "" Then
    DoEvents
    ShellX = Shell("command.com /c ping -n " & txtNumber.Text & " " & txtIP.Text & " > C:\log.txt", vbHide)

    lPid = ShellX
    If lPid <> 0 Then
        lHnd = OpenProcess(SYNCHRONIZE, 0, lPid)
        If lHnd <> 0 Then
            lRet = WaitForSingleObject(lHnd, INFINITE)
            CloseHandle (lHnd)
        End If
            Beep
            frmMain.MousePointer = 0
            Open "C:\log.txt" For Input As #1
            txtOutPut.Text = Input(LOF(1), 1)
            Close #1
    End If
  Else
    frmMain.MousePointer = 0
    VarX = MsgBox("You have not entered an ip address or the number of times you want to ping.", vbCritical, "Error has occured")
  End If
End Sub

Microsoft Internet Transfer 控件StateChanged(ByVal State As Integer) 事件
State 的设置值：常数值描述
icNone 0 无状态可报告。
icHostResolvingHost 1 该控件正在查询所指定的主机的 IP 地址。
icHostResolved 2 该控件已成功地找到所指定的主机的 IP 地址。
icConnecting 3 该控件正在与主机连接。
icConnected 4 该控件已与主机连接成功。
icRequesting 5 该控件正在向主机发送请求。
icRequestSent 6 该控件发送请求已成功。
icReceivingResponse 7 该控件正在接收主机的响应。
icResponseReceived 8 该控件已成功地接收到主机的响应。
icDisconnecting 9 该控件正在解除与主机的连接。
icDisconnected 10 该控件已成功地与主机解除了连接。
icError 11 与主机通讯时出现了错误。
icResponseCompleted 12 该请求已经完成，并且所有数据均已接收到。
不可以么?

PING一个IP地址(向它发送一个数据包并等待回应) 本例演示了怎样通过API的调用向一个IP地址发送一个包的数据并等待回音。
新建一个工程，添加一个标准模块，写入以下代码：Option ExplicitPublic Const IP_STATUS_BASE = 11000
Public Const IP_SUCCESS = 0
Public Const IP_BUF_TOO_SMALL = (11000 + 1)
Public Const IP_DEST_NET_UNREACHABLE = (11000 + 2)
Public Const IP_DEST_HOST_UNREACHABLE = (11000 + 3)
Public Const IP_DEST_PROT_UNREACHABLE = (11000 + 4)
Public Const IP_DEST_PORT_UNREACHABLE = (11000 + 5)
Public Const IP_NO_RESOURCES = (11000 + 6)
Public Const IP_BAD_OPTION = (11000 + 7)
Public Const IP_HW_ERROR = (11000 + 8)
Public Const IP_PACKET_TOO_BIG = (11000 + 9)
Public Const IP_REQ_TIMED_OUT = (11000 + 10)
Public Const IP_BAD_REQ = (11000 + 11)
Public Const IP_BAD_ROUTE = (11000 + 12)
Public Const IP_TTL_EXPIRED_TRANSIT = (11000 + 13)
Public Const IP_TTL_EXPIRED_REASSEM = (11000 + 14)
Public Const IP_PARAM_PROBLEM = (11000 + 15)
Public Const IP_SOURCE_QUENCH = (11000 + 16)
Public Const IP_OPTION_TOO_BIG = (11000 + 17)
Public Const IP_BAD_DESTINATION = (11000 + 18)
Public Const IP_ADDR_DELETED = (11000 + 19)
Public Const IP_SPEC_MTU_CHANGE = (11000 + 20)
Public Const IP_MTU_CHANGE = (11000 + 21)
Public Const IP_UNLOAD = (11000 + 22)
Public Const IP_ADDR_ADDED = (11000 + 23)
Public Const IP_GENERAL_FAILURE = (11000 + 50)
Public Const MAX_IP_STATUS = 11000 + 50
Public Const IP_PENDING = (11000 + 255)
Public Const PING_TIMEOUT = 200
Public Const WS_VERSION_REQD = &H101
Public Const WS_VERSION_MAJOR = WS_VERSION_REQD \ &H100 And &HFF&
Public Const WS_VERSION_MINOR = WS_VERSION_REQD And &HFF&
Public Const MIN_SOCKETS_REQD = 1
Public Const SOCKET_ERROR = -1Public Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128Public Type ICMP_OPTIONS
Ttl As Byte
Tos As Byte
Flags As Byte
OptionsSize As Byte
OptionsData As Long
End TypeDim ICMPOPT As ICMP_OPTIONSPublic Type ICMP_ECHO_REPLY
Address As Long
status As Long
RoundTripTime As Long
DataSize As Integer
Reserved As Integer
DataPointer As Long
Options As ICMP_OPTIONS
Data As String * 250
End TypePublic Type HOSTENT
hName As Long
hAliases As Long
hAddrType As Integer
hLen As Integer
hAddrList As Long
End TypePublic 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 TypePublic Declare Function IcmpCreateFile Lib "icmp.dll" () As Long
Public Declare Function IcmpCloseHandle Lib "icmp.dll" (ByVal IcmpHandle As Long) As Long
Public Declare Function IcmpSendEcho Lib "icmp.dll" (ByVal IcmpHandle As Long, ByVal DestinationAddress As Long, ByVal RequestData As String, ByVal RequestSize As Integer, ByVal RequestOptions As Long, ReplyBuffer As ICMP_ECHO_REPLY, ByVal ReplySize As Long, ByVal Timeout As Long) As Long
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 RtlMoveMemory Lib "kernel32" (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)Public Function GetStatusCode(status As Long) As StringDim msg As StringSelect Case status
Case IP_SUCCESS: msg = "ip success"
Case IP_BUF_TOO_SMALL: msg = "ip buf too_small"
Case IP_DEST_NET_UNREACHABLE: msg = "ip dest net unreachable"
Case IP_DEST_HOST_UNREACHABLE: msg = "ip dest host unreachable"
Case IP_DEST_PROT_UNREACHABLE: msg = "ip dest prot unreachable"
Case IP_DEST_PORT_UNREACHABLE: msg = "ip dest port unreachable"
Case IP_NO_RESOURCES: msg = "ip no resources"
Case IP_BAD_OPTION: msg = "ip bad option"
Case IP_HW_ERROR: msg = "ip hw_error"
Case IP_PACKET_TOO_BIG: msg = "ip packet too_big"
Case IP_REQ_TIMED_OUT: msg = "ip req timed out"
Case IP_BAD_REQ: msg = "ip bad req"
Case IP_BAD_ROUTE: msg = "ip bad route"
Case IP_TTL_EXPIRED_TRANSIT: msg = "ip ttl expired transit"
Case IP_TTL_EXPIRED_REASSEM: msg = "ip ttl expired reassem"
Case IP_PARAM_PROBLEM: msg = "ip param_problem"
Case IP_SOURCE_QUENCH: msg = "ip source quench"
Case IP_OPTION_TOO_BIG: msg = "ip option too_big"
Case IP_BAD_DESTINATION: msg = "ip bad destination"
Case IP_ADDR_DELETED: msg = "ip addr deleted"
Case IP_SPEC_MTU_CHANGE: msg = "ip spec mtu change"
Case IP_MTU_CHANGE: msg = "ip mtu_change"
Case IP_UNLOAD: msg = "ip unload"
Case IP_ADDR_ADDED: msg = "ip addr added"
Case IP_GENERAL_FAILURE: msg = "ip general failure"
Case IP_PENDING: msg = "ip pending"
Case PING_TIMEOUT: msg = "ping timeout"
Case Else: msg = "unknown msg returned"
End Select
GetStatusCode = CStr(status) & " [ " & msg & " ]"
End FunctionPublic Function HiByte(ByVal wParam As Integer)
HiByte = wParam \ &H1 And &HFF&
End FunctionPublic Function LoByte(ByVal wParam As Integer)
LoByte = wParam And &HFF&
End FunctionPublic Function Ping(szAddress As String, ECHO As ICMP_ECHO_REPLY) As Long
Dim hPort As Long
Dim dwAddress As Long
Dim sDataToSend As String
Dim iOpt As Long
sDataToSend = "Echo This"
dwAddress = AddressStringToLong(szAddress)
hPort = IcmpCreateFile()
If IcmpSendEcho(hPort, dwAddress, sDataToSend, Len(sDataToSend), 0, ECHO, Len(ECHO), PING_TIMEOUT) Then
'the ping succeeded,
'.Status will be 0
'.RoundTripTime is the time in ms for the ping to complete,
'.Data is the data returned (NULL terminated)
'.Address is the Ip address that actually replied
'.DataSize is the size of the string in .Data
Ping = ECHO.RoundTripTime
Else
Ping = ECHO.status * -1
End If
Call IcmpCloseHandle(hPort)
End Function

Function AddressStringToLong(ByVal tmp As String) As Long
Dim i As Integer
Dim parts(1 To 4) As String
i = 0
'we have to extract each part of the
'123.456.789.123 string, delimited by
'a period
While InStr(tmp, ".") > 0
i = i + 1
parts(i) = Mid(tmp, 1, InStr(tmp, ".") - 1)
tmp = Mid(tmp, InStr(tmp, ".") + 1)
Wend
i = i + 1
parts(i) = tmp
If i <> 4 Then
AddressStringToLong = 0
Exit Function
End If
'build the long value out of the
'hex of the extracted strings
AddressStringToLong = Val("&H" & Right("00" & Hex(parts(4)), 2) & _
Right("00" & Hex(parts(3)), 2) & _
Right("00" & Hex(parts(2)), 2) & _
Right("00" & Hex(parts(1)), 2))
End FunctionPublic Function SocketsCleanup() As Boolean
Dim X As Long
X = WSACleanup()
If X <> 0 Then
MsgBox "Windows Sockets error " & Trim$(Str$(X)) & " occurred in Cleanup.", vbExclamation
SocketsCleanup = False
Else
SocketsCleanup = True
End If
End FunctionPublic Function SocketsInitialize() As Boolean
Dim WSAD As WSADATA
Dim X As Integer
Dim szLoByte As String, szHiByte As String, szBuf As String
X = WSAStartup(WS_VERSION_REQD, WSAD)
If X <> 0 Then
MsgBox "Windows Sockets for 32 bit Windows " & "environments is not successfully responding."
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
szHiByte = Trim$(Str$(HiByte(WSAD.wVersion)))
szLoByte = Trim$(Str$(LoByte(WSAD.wVersion)))
szBuf = "Windows Sockets Version " & szLoByte & "." & szHiByte
szBuf = szBuf & " is not supported by Windows " & "Sockets for 32 bit Windows environments."
MsgBox szBuf, vbExclamation
SocketsInitialize = False
Exit Function
End If
If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
szBuf = "This application requires a minimum of " & Trim$(Str$(MIN_SOCKETS_REQD)) & " supported sockets."
MsgBox szBuf, vbExclamation
SocketsInitialize = False
Exit Function
End If
SocketsInitialize = True
End Function在Form中添加一个命令按钮Command1，一个文本框Text2，创建一个TextBox数组(Text1(0)到Text1(5))。在窗体中写入如下代码：
Private Sub Command1_Click()
Dim ECHO As ICMP_ECHO_REPLY
Dim pos As Integer
Call Ping(Text2.Text, ECHO)
Text1(0) = GetStatusCode(ECHO.status)
Text1(1) = ECHO.Address
Text1(2) = ECHO.RoundTripTime & " ms"
Text1(3) = ECHO.DataSize & " bytes"
If Left$(ECHO.Data, 1) <> Chr$(0) Then
pos = InStr(ECHO.Data, Chr$(0))
Text1(4) = Left$(ECHO.Data, pos - 1)
End If
Text1(5) = ECHO.DataPointer
End Sub
看看有什么结果吧。

Consult This Article:在Vb中如何使用ping命令
http://www.sijiqing.com/vbgood/experience/index.asp?action=read&id=1543

Consult To This Article:1 How to Ping an IP Address Using Visual Basic http://vbnet.mvps.org/code/internet/ping.htm2 Determining a Network Host Name and IP Address Using Visual Basic
http://vbnet.mvps.org/code/network/ipaddress.htm

唉，这些都是局域网内的应用. 得不到 Internet 上的机器 IP.

ping 過去應該可以得到，隻需要在vb中監測就可以了
偶給不了代碼，上次全部掉了

关注:楼上的没看清楚么? 是“如何得到一个域名的 IP地址 ”。你说的那两种是在局域网内查看机器名和 IP（Lan的）。不知用 Inet控件可以么？有谁用过呢？我看MSDN给的例子没弄明白。

又用过 Inet 控件的么? 这个控件可以么?MSDN 我没看明白.多谢

调试易

如何得到域名的IP

解决方案 »

如何 得到 域名的IP

解决方案 »

如何得到域名的IP