整理收收藏的代码：

Option Compare Database

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

Declare Function wu_GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
Declare Function wu_GetComputerName Lib "kernel32.dll" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) 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 ap_GetComputerName() As Variant
Dim strComputerName As String
Dim lngLength As Long
Dim lngResult As Long

strComputerName = String(255, 0)
lngLength = 255

lngResult = wu_GetComputerName(strComputerName, lngLength)
ap_GetComputerName = Left(strComputerName, InStr(1, strComputerName, Chr(0)) - 1)

End Function

Function ap_GetUserName() As Variant
Dim strUserName As String
Dim lngLength As Long
Dim lngResult As Long

strUserName = String(255, 0)
lngLength = 255

lngResult = wu_GetUserName(strUserName, lngLength)
ap_GetUserName = Left(strUserName, InStr(1, strUserName, Chr(0)) - 1)

End Function
Function GetComputerIP() 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 vntTemp As Variant

SocketsInitialize

hostent_addr = gethostbyname(vntTemp)

If hostent_addr = 0 Then
MsgBox "Can't resolve name."
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
GetComputerIP = GetComputerIP & temp_ip_address(I) & "."
Next
GetComputerIP = Mid$(GetComputerIP, 1, Len(GetComputerIP) - 1)

SocketsCleanup
End Function

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

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

 

'调用方法--'
'Private Sub Command0_Click()
'MsgBox ap_GetComputerName
'MsgBox ap_GetUserName
'MsgBox GetComputerIP
'End Sub