Option Explicit Public 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 = -1 Public Type HOSTENT hName As Long hAliases As Long hAddrType As Integer hLen As Integer hAddrList As Long End Type 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 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 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) SocketsCleanup End Function Public Function HiByte(ByVal wParam As Integer) As Integer 'modified Oct 11/99 'The origional method as 'HiByte = wParam \ &H100 And &HFF& 'would generate Division by 0 errors on some 'systems when compiled to Native Code exe (yet 'work in the IDE or when compiled as pCode). 'Although adding brackets should force the 'correct evaluation to occur first, the problem 'remained on some systems. The additional step below 'assigning the initial evaluation result to a temp 'variable should reslove the problem. If it doesn't, 'then it looks like a pCode compile needs to be used 'with this (and, for that matter, possibly all) 'projects. Dim tmp as Integer tmp = wParam \ &H100 HiByte = tmp And &HFF& End Function Public Function LoByte(ByVal wParam As Integer) 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 Function2.在界面上添加2个textbox(Text1, Text2)和1个button(cmdGetMachineID)
Option Explicit Private Sub cmdGetMachineID_Click() Text1 = GetIPHostName() Text2 = GetIPAddress() End Sub