Private Sub Form_Load()
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Debug.Print ChangeIP("192.168.1.200", "255.255.255.0", "", "", "")
End Sub Public Function ChangeIP(IP As String, NM As String, GW As String, MDNS As String, SDNS As String) As String
'返回值说明:返回一个设置的中文说明.
Dim strComputer, objWMIService, colNetAdapters, strIPAddress, strSubnetMask
Dim strGateway, strGatewaymetric, strDNS, objNetAdapter, errEnable, errGateways, errDNS
strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" strComputer "\root\cimv2")
Set colNetAdapters = objWMIService.ExecQuery("Select * from Win32_NetworkAdapterConfiguration where IPEnabled=TRUE")
strIPAddress = Array(IP) 'ip地址
strSubnetMask = Array(NM) '子网掩码
strGateway = Array(GW) '网关
strDNS = Array(MDNS, SDNS) '主DNS各备DNS
strGatewaymetric = Array(1)
For Each objNetAdapter In colNetAdapters
errEnable = objNetAdapter.EnableStatic(strIPAddress, strSubnetMask)
errGateways = objNetAdapter.SetGateways(strGateway, strGatewaymetric)
errDNS = objNetAdapter.SetDNSServerSearchOrder(strDNS)
If errEnable = 0 And errGateways = 0 And errDNS = 0 Then
ChangeIP = "设置成功"
Else
If errEnable = 0 Then
ChangeIP = "IP地址和子网掩码设置成功, "
Else
ChangeIP = "IP地址或子网掩码设置失败, "
End If
If errGateways = 0 Then
ChangeIP = ChangeIP "默认网关设置成功, "
Else
ChangeIP = ChangeIP "默认网关设置失败, "
End If
If errDNS = 0 Then
ChangeIP = ChangeIP "DNS设置成功"
Else
ChangeIP = ChangeIP "DNS设置失败"
End If
End If
NextEnd Function
1.获取当前电脑名：System.Net.Dns.GetHostName()
2.根据电脑名取出全部IP地址：System.Net.Dns.Resolve(电脑名).AddressList
或者 System.Net.Dns.GetHostByName(电脑名).AddressList
3.根据IP地址取出电脑名：System.Net.Dns.Resolve(IP地址).HostName
Dim th As Threading.Thread
2 Dim tcpl As System.Net.Sockets.TcpListener
3
4 Private Sub Form1_Load()Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
5 th = New System.Threading.Thread(New System.Threading.ThreadStart(AddressOf MyListen))
6 th.Start()
7 End Sub
8
9 Public Sub SendMessage()Sub SendMessage(ByVal IP As String, ByVal SendMsg As String)
10 Try
11 If IP "" Then
12 Dim tcpc As New System.Net.Sockets.TcpClient(IP, 5656)
13 Dim tcpStream As Net.Sockets.NetworkStream = tcpc.GetStream
14 Dim reqStream As New IO.StreamWriter(tcpStream)
15 reqStream.Write(SendMsg)
16 reqStream.Flush()
17 tcpStream.Close()
18 tcpc.Close()
19 End If
20 Catch ex As Exception
21 MsgBox(ex.Message.ToString)
22 End Try
23 End Sub
24 Private Sub MyListen()Sub MyListen()
25 Try
26 Dim ipAddress As System.Net.IPAddress = System.Net.Dns.Resolve(System.Net.Dns.GetHostName).AddressList(0)
27 tcpl = New System.Net.Sockets.TcpListener(ipAddress, 5656)
28 tcpl.Start()
29 While True
30 Dim s As System.Net.Sockets.Socket = tcpl.AcceptSocket()
31 Dim MyBuffer(1024) As Byte
32 Dim i As Integer
33 i = s.Receive(MyBuffer)
34 If i 0 Then
35 Dim lstrRec As String
36 Dim j As Integer
37 For j = 0 To i - 1
38 TextBox1.Text += Chr(MyBuffer(j)) ","
39 Next
40 End If
41 End While
42 Catch ex As Exception
43 MsgBox(ex.Message.ToString)
44 End Try
45 End Sub
46
47 Private Sub Button1_Click()Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
48 SendMessage("192.168.0.61", TextBox2.Text)
49 End Sub
需要出口设备进行映射内部地址；或使用打洞技术穿透NAT,但使用TCP打洞非常困难。
参考
穿透NAT是非常困难的，因为NAT的过程中在出口路由器上的Port已经不是你定义的iPort了，具体是多少也不固定
做exe程序获取本机IP地址用
System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName()).AddressList
做web程序获取客户端的IP地址用
HttpContext.Current.Request.ServerVariables（"REMOTE_ADDR"]）
建议你使用注册表的API进行修改
封装两个NET函数给你
private string GetReg(string RegPath) 取得注册表项内容
{
string str="";
RegistryKey hkml = Registry.LocalMachine;
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true);
RegistryKey aimdir = software.OpenSubKey("krabs",true);
if (aimdir != null)
{
if (aimdir.GetValue(RegPath) != null)
str = aimdir.GetValue(RegPath).ToString();
if (str != null)
return str;
return null;
}
return null;
}
private bool SetReg(string RegPath,string Data) //设置注册表内容
{
RegistryKey reg = Registry.LocalMachine;
RegistryKey software = reg.OpenSubKey("SOFTWARE", true);
RegistryKey aimdir1 = software.CreateSubKey("krabs");
if (aimdir1 == null)
return false;
aimdir1.SetValue(RegPath, Data);
return true;
}