【VB声明】
Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long【别名】
GetComputerNameA【说明】
取得这台计算机的名称 【返回值】
Long，TRUE（非零）表示成功，否则返回零。会设置GetLastError 【备注】
也许你会发现，MAX_COMPUTERNAME_LENGTH常数在vb自带的api文本查看器中找不到。的确，我也没有找到。但我有一个工具：Listapi，这个常数在它那里可以找到【参数表】
lpBuffer ------- String，随同计算机名载入的字串缓冲区 nSize ---------- Long，缓冲区的长度。这个变量随同返回计算机名的实际长度载入
Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long【别名】
GetComputerNameA【说明】
取得这台计算机的名称 【返回值】
Long，TRUE（非零）表示成功，否则返回零。会设置GetLastError 【备注】
也许你会发现，MAX_COMPUTERNAME_LENGTH常数在vb自带的api文本查看器中找不到。的确，我也没有找到。但我有一个工具：Listapi，这个常数在它那里可以找到【参数表】
lpBuffer ------- String，随同计算机名载入的字串缓冲区 nSize ---------- Long，缓冲区的长度。这个变量随同返回计算机名的实际长度载入
Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long
说明
取得这台计算机的名称
返回值
Long，TRUE（非零）表示成功，否则返回零。会设置GetLastError
参数表
参数 类型及说明
lpBuffer String，随同计算机名载入的字串缓冲区
nSize Long，缓冲区的长度。这个变量随同返回计算机名的实际长度载入
注解
注意nSize参数并不是按值传递的。参考api32.txt，了解MAX_COMPUTER_NAME常数的值
示例
Dim s$
s$ = String$(MAX_COMPUTERNAME_LENGTH+1,0)
Dim dl&
Dim sz&
sz& = MAX_COMPUTERNAME_LENGTH+1
dl& = GetComputerName(s$, sz)
其他
也许你会发现，MAX_COMPUTERNAME_LENGTH常数在vb自带的api文本查看器中找不到。的确，我也没有找到。但我有一个工具：Listapi，这个常数在它那里可以找到
'例子:Private Sub Command1_Click()
MsgBox (MachineName)
End SubPublic Function MachineName() As String
Dim sBuffer As String * 255If GetComputerName(sBuffer, 255&) <> 0 Then
MachineName = Left$(sBuffer, InStr(sBuffer, vbNullChar) - 1)
Else
MachineName = "(未知)"
End If
End Function
'*********************************************************
'* 名称：ComputerName
'* 功能：返回计算机名称
'* 用法：
'*********************************************************
Public Function ComputerName() As String
Dim l1 As String
Dim l2 As Long
Dim l3 As Long
l2 = 255
l1 = String$(l2, " ")
l3 = GetComputerName(l1, l2)
ComputerName = ""
If l3 <> 0 Then
ComputerName = Left(l1, l2)
End If
End Function
VERSION 5.00
Begin VB.Form Form1
BorderStyle = 1 'Fixed Single
Caption = "取得主机名&IP地址"
ClientHeight = 1770
ClientLeft = 45
ClientTop = 330
ClientWidth = 4515
LinkTopic = "Form1"
MaxButton = 0 'False
MinButton = 0 'False
ScaleHeight = 1770
ScaleWidth = 4515
StartUpPosition = 2 '屏幕中心
Begin VB.CommandButton Command2
Caption = "退出"
Height = 375
Left = 2970
TabIndex = 5
Top = 1200
Width = 975
End
Begin VB.CommandButton Command1
Caption = "取得主机名及IP地址"
Height = 375
Left = 570
TabIndex = 4
Top = 1200
Width = 1815
End
Begin VB.TextBox Text2
Height = 270
Left = 1680
TabIndex = 3
Top = 720
Width = 2415
End
Begin VB.TextBox Text1
Height = 270
Left = 1680
TabIndex = 2
Top = 240
Width = 2415
End
Begin VB.Label Label2
Caption = "IP地址:"
Height = 255
Left = 240
TabIndex = 1
Top = 720
Width = 1215
End
Begin VB.Label Label1
Caption = "主机名:"
Height = 255
Left = 240
TabIndex = 0
Top = 240
Width = 1215
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
Text1 = GetIPHostName()
Text2 = GetIPAddress()
End SubPrivate Sub Command2_Click()
End
End Sub
保存为form1.frm
Type=Exe
Form=Form1.frm
Reference=*\G{00020430-0000-0000-C000-000000000046}#2.0#0#C:\WINDOWS\SYSTEM\StdOle2.Tlb#OLE Automation
Module=Module1; Module1.bas
IconForm="Form1"
Startup="Form1"
HelpFile=""
Title="GetHost_IP"
ExeName32="GetHost_IP.exe"
Command32=""
Name="工程1"
HelpContextID="0"
CompatibleMode="0"
MajorVer=1
MinorVer=0
RevisionVer=0
AutoIncrementVer=0
ServerSupportFiles=0
VersionCompanyName="twen"
CompilationType=0
OptimizationType=0
FavorPentiumPro(tm)=0
CodeViewDebugInfo=0
NoAliasing=0
BoundsCheck=0
OverflowCheck=0
FlPointCheck=0
FDIVCheck=0
UnroundedFP=0
StartMode=0
Unattended=0
Retained=0
ThreadPerObject=0
MaxNumberOfThreads=1
保存为gethost&IP.vbp
Attribute VB_Name = "Module1"
Option ExplicitPublic Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128
Public Const ERROR_SUCCESS As Long = 0
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 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 Type
Public Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As LongPublic Declare Function WSAStartup Lib "WSOCK32.DLL" _
(ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Public Declare Function WSACleanup Lib "WSOCK32.DLL" () As LongPublic 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 CopyMemory 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
'gethostname returns the name of the local host into
'the buffer specified by the name parameter. The host
'name is returned as a null-terminated string. The
'form of the host name is dependent on the Windows
'Sockets provider - it can be a simple host name, or
'it can be a fully qualified domain name. However, it
'is guaranteed that the name returned will be successfully
'parsed by gethostbyname and WSAAsyncGetHostByName. 'In actual application, if no local host name has been
'configured, gethostname must succeed and return a token
'host name that gethostbyname or WSAAsyncGetHostByName
'can resolve.
If gethostname(sHostName, 256) = SOCKET_ERROR Then
GetIPAddress = ""
MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & _
" has occurred. Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
'gethostbyname returns a pointer to a HOSTENT structure
'- a structure allocated by Windows Sockets. The HOSTENT
'structure contains the results of a successful search
'for the host specified in the name parameter. 'The application must never attempt to modify this
'structure or to free any of its components. Furthermore,
'only one copy of this structure is allocated per thread,
'so the application should copy any information it needs
'before issuing any other Windows Sockets function calls. 'gethostbyname function cannot resolve IP address strings
'passed to it. Such a request is treated exactly as if an
'unknown host name were passed. Use inet_addr to convert
'an IP address string the string to an actual IP address,
'then use another function, gethostbyaddr, to obtain the
'contents of the HOSTENT structure.
sHostName = Trim$(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
'to extract the returned IP address, we have to copy
'the HOST structure and its members
CopyMemory HOST, lpHost, Len(HOST)
CopyMemory dwIPAddr, HOST.hAddrList, 4
'create an array to hold the result
ReDim tmpIPAddr(1 To HOST.hLen)
CopyMemory tmpIPAddr(1), dwIPAddr, HOST.hLen
'and with the array, build the actual address,
'appending a period between members
For i = 1 To HOST.hLen
sIPAddr = sIPAddr & tmpIPAddr(i) & "."
Next
'the routine adds a period to the end of the
'string, so remove it here
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)
SocketsCleanupEnd Function
Public Function HiByte(ByVal wParam As Integer) As Byte
'note: VB4-32 users should declare this function As Integer
HiByte = (wParam And &HFF00&) \ (&H100)
End Function
Public Function LoByte(ByVal wParam As Integer) As Byte 'note: VB4-32 users should declare this function 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 SubPublic 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
保存为Module1.bas
见《WINDOWS网络编程VB篇》