取得本机IP地址的方法两则

答案：方法1：(控件法）

新建工程，在工程中加入Winsock控件和一个按钮控件

代码：

Option Explicit

Private Sub Command1_Click()
   MsgBox "当前计算机网卡IP：" & Winsock1.LocalIP
End Sub

方法2：（API法）

新建工程，在工程中加入一个按钮控件

代码：

Option Explicit

Private Type WSAData
    wVersion As Integer
    wHighVersion As Integer
    szDescription(0 To 256)
    szSystemStatus(0 To 128)
    wMaxSockets As Integer
    dwVendorInfo As Long
End Type

Private Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal wVersionRequired As Long, lpWSAData As WSAData) As Long
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long
Private Declare Function gethostname Lib "WSOCK32.DLL" (ByVal szHost As String, ByVal dwHostLen As Long) As Long
Private Declare Function gethostbyname Lib "WSOCK32.DLL" (ByVal szHost As String) As Long
Private Declare Sub CopyMemoryIP Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)

Private Function GetIPAddress() As String
    On Error GoTo Z
    Dim wsa As WSAData
    Dim rVal As Long
    Dim sHost As String * 256
    Dim lp As Long
    Dim lpa As Long
    Dim IpAdr(0 To 3) As Byte
    rVal = WSAStartup((2 + &H100), wsa)
    If rVal = 0 Then
        gethostname sHost, 256
        lp = gethostbyname(sHost)
        If lp Then
            CopyMemoryIP lpa, lp + 16, 4
            CopyMemoryIP IpAdr(0), lpa, 4
            GetIPAddress = CStr(IpAdr(0)) & "." & CStr(IpAdr(1)) & "." & CStr(IpAdr(2)) & "." & CStr(IpAdr(3))
        End If
        WSACleanup
    End If
    Exit Function
Z:
    GetIPAddress = ""
End Function

Private Sub Command1_Click()
   Dim ret As String
   ret = GetIPAddress
   If ret <> "" Then
      MsgBox "当前计算机网卡IP：" & ret
   End If
End Sub

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