无忧岛

新建窗体,然后拉个Command按钮控件和Textbox文本控件就OK了!
注意:本模块获取的是当前机器的内网IP地址
其实也用的是API来实现的,下面是主要代码

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

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)
    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

Private Sub Command1_Click()
    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(Text1)

    If hostent_addr = 0 Then
        MsgBox "Can't resolve name."
        Exit Sub
    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)

'MsgBox ip_address
    Text1.Text = ip_address
End Sub

Sub Form_Load()
    SocketsInitialize
End Sub

Private Sub Form_Unload(Cancel As Integer)
    SocketsCleanup
End Sub