利用VB的Winsock控件，通过UDP协议实现两台机器的聊天进程相互传送数据的代码
vb\u91cc\u600e\u4e48\u901a\u8fc7winsock\u5b9e\u73b0\u4e24\u53f0\u8ba1\u7b97\u673a\u7684\u6570\u636e\u4f20\u8f93\uff0c\uff0c\u6bcf\u53f0\u8ba1\u7b97\u673a\u4e00\u4e2a\u7a0b\u5e8f\uff0c\uff0c\u6c42\u5927\u4fa0\u6307\u5bfc~~UDP \u521d\u6b65
\u521b\u5efa UDP \u5e94\u7528\u7a0b\u5e8f\u6bd4\u521b\u5efa TCP \u5e94\u7528\u7a0b\u5e8f\u8fd8\u8981\u7b80\u5355\uff0c\u56e0\u4e3a UDP \u534f\u8bae\u4e0d\u9700\u8981\u663e\u5f0f\u7684\u8fde\u63a5\u3002\u5728\u4e0a\u9762\u7684 TCP \u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u4e00\u4e2a Winsock \u63a7\u4ef6\u5fc5\u987b\u663e\u5f0f\u5730\u8fdb\u884c\u201c\u76d1\u542c\u201d\uff0c\u53e6\u4e00\u4e2a\u5fc5\u987b\u4f7f\u7528 Connect \u65b9\u6cd5\u521d\u59cb\u5316\u8fde\u63a5\u3002
UDP \u534f\u8bae\u4e0d\u9700\u8981\u663e\u5f0f\u7684\u8fde\u63a5\u3002\u8981\u5728\u4e24\u4e2a\u63a7\u4ef6\u4e2d\u95f4\u53d1\u9001\u6570\u636e\uff0c\u9700\u8981\u5b8c\u6210\u4ee5\u4e0b\u7684\u4e09\u6b65\uff08\u5728\u8fde\u63a5\u7684\u53cc\u65b9\uff09\uff1a
\u5c06 RemoteHost \u5c5e\u6027\u8bbe\u7f6e\u4e3a\u53e6\u4e00\u53f0\u8ba1\u7b97\u673a\u7684\u540d\u79f0\u3002
\u5c06 RemotePort \u5c5e\u6027\u8bbe\u7f6e\u4e3a\u7b2c\u4e8c\u4e2a\u63a7\u4ef6\u7684 LocalPort \u5c5e\u6027\u3002
\u8c03\u7528 Bind \u65b9\u6cd5\uff0c\u6307\u5b9a\u4f7f\u7528\u7684 LocalPort\u3002\uff08\u4e0b\u9762\u5c06\u8be6\u7ec6\u5730\u8ba8\u8bba\u8be5\u65b9\u6cd5\u3002\uff09
\u56e0\u4e3a\u4e24\u53f0\u8ba1\u7b97\u673a\u7684\u5730\u4f4d\u53ef\u4ee5\u770b\u6210\u201c\u5e73\u7b49\u7684\u201d\uff0c\u8fd9\u79cd\u5e94\u7528\u7a0b\u5e8f\u4e5f\u88ab\u79f0\u4e3a\u70b9\u5230\u70b9\u7684\u3002\u4e3a\u4e86\u5177\u4f53\u8bf4\u660e\u8fd9\u4e2a\u95ee\u9898\uff0c\u4e0b\u9762\u5c06\u521b\u5efa\u4e00\u4e2a\u201c\u804a\u5929\u201d\u5e94\u7528\u7a0b\u5e8f\uff0c\u4e24\u4e2a\u4eba\u53ef\u4ee5\u901a\u8fc7\u5b83\u8fdb\u884c\u5b9e\u65f6\u7684\u4ea4\u8c08\u3002
\u8981\u521b\u5efa\u4e00\u4e2a UDP \u4f19\u4f34\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u6267\u884c\uff1a
\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 Standard EXE \u5de5\u7a0b\u3002
\u5c06\u7f3a\u7701\u7684\u7a97\u4f53\u7684\u540d\u79f0\u4fee\u6539\u4e3a frmPeerA\u3002
\u5c06\u7a97\u4f53\u7684\u6807\u9898\u4fee\u6539\u4e3a\u201cPeer A\u201d\u3002
\u5728\u7a97\u4f53\u4e2d\u653e\u5165\u4e00\u4e2a Winsock \u63a7\u4ef6\uff0c\u5e76\u5c06\u5176\u547d\u540d\u4e3a udpPeerA\u3002
\u5728\u201c\u5c5e\u6027\u201d\u9875\u4e0a\uff0c\u5355\u51fb\u201c\u534f\u8bae\u201d\u5e76\u5c06\u534f\u8bae\u4fee\u6539\u4e3a UDPProtocol\u3002
\u5728\u7a97\u4f53\u4e2d\u6dfb\u52a0\u4e24\u4e2a TextBox \u63a7\u4ef6\u3002\u5c06\u7b2c\u4e00\u4e2a\u547d\u540d\u4e3a txtSend\uff0c\u7b2c\u4e8c\u4e2a\u547d\u540d\u4e3a txtOutput\u3002
\u4e3a\u7a97\u4f53\u589e\u52a0\u5982\u4e0b\u7684\u4ee3\u7801\u3002 Private Sub Form_Load()
'\u63a7\u4ef6\u7684\u540d\u5b57\u4e3a udpPeerAWith udpPeerA'\u91cd\u70b9:\u5fc5\u987b\u5c06 RemoteHost \u7684\u503c
'\u4fee\u6539\u4e3a\u8ba1\u7b97\u673a\u7684\u540d\u5b57\u3002
.RemoteHost= "PeerB" .RemotePort = 1001 '\u8fde\u63a5\u7684\u7aef\u53e3\u53f7\u3002
.Bind 1002 '\u7ed1\u5b9a\u5230\u672c\u5730\u7684\u7aef\u53e3\u3002
End WithfrmPeerB.Show '\u663e\u793a\u7b2c\u4e8c\u4e2a\u7a97\u4f53\u3002
End SubPrivate Sub txtSend_Change()'\u5728\u952e\u5165\u6587\u672c\u65f6\uff0c\u7acb\u5373\u5c06\u5176\u53d1\u9001\u51fa\u53bb\u3002
udpPeerA.SendData txtSend.TextEnd SubPrivate Sub udpPeerA_DataArrival _(ByVal bytesTotal As Long)Dim strData As StringudpPeerA.GetData strDatatxtOutput.Text = strDataEnd Sub
\u8981\u521b\u5efa\u7b2c\u4e8c\u4e2a UDP \u4f19\u4f34\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u6267\u884c\uff1a
\u5728\u5de5\u7a0b\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u6807\u51c6\u7a97\u4f53\u3002
\u5c06\u7a97\u4f53\u7684\u540d\u5b57\u4fee\u6539\u4e3a frmPeerB\u3002
\u5c06\u7a97\u4f53\u7684\u6807\u9898\u4fee\u6539\u4e3a\u201cPeer B\u201d\u3002
\u5728\u7a97\u4f53\u4e2d\u653e\u5165\u4e00\u4e2a Winsock \u63a7\u4ef6\uff0c\u5e76\u5c06\u5176\u547d\u540d\u4e3a udpPeerB\u3002
\u5728\u201c\u5c5e\u6027\u201d\u9875\u4e0a\uff0c\u5355\u51fb\u201c\u534f\u8bae\u201d\u5e76\u5c06\u534f\u8bae\u4fee\u6539\u4e3a\u201cUDPProtocol\u201d\u3002
\u5728\u7a97\u4f53\u4e0a\u6dfb\u52a0\u4e24\u4e2a TextBox \u63a7\u4ef6\u3002\u5c06\u7b2c\u4e00\u4e2a\u547d\u540d\u4e3a txtSend\uff0c\u7b2c\u4e8c\u4e2a\u547d\u540d\u4e3a txtOutput\u3002
\u5728\u7a97\u4f53\u4e2d\u6dfb\u52a0\u5982\u4e0b\u7684\u4ee3\u7801\u3002 Private Sub Form_Load()
'\u63a7\u4ef6\u7684\u540d\u5b57\u4e3a udpPeerB\u3002
With udpPeerB'\u91cd\u70b9:\u5fc5\u987b\u5c06 RemoteHost \u7684\u503c\u6539\u4e3a
'\u8ba1\u7b97\u673a\u7684\u540d\u5b57\u3002
.RemoteHost= "PeerA".RemotePort = 1002 '\u8981\u8fde\u63a5\u7684\u7aef\u53e3\u3002
.Bind 1001 '\u7ed1\u5b9a\u5230\u672c\u5730\u7684\u7aef\u53e3\u4e0a\u3002
End WithEnd SubPrivate Sub txtSend_Change()'\u5728\u952e\u5165\u540e\u7acb\u5373\u53d1\u9001\u6587\u672c\u3002udpPeerB.SendData txtSend.TextEnd SubPrivate Sub udpPeerB_DataArrival _(ByVal bytesTotal As Long)Dim strData As StringudpPeerB.GetData strDatatxtOutput.Text = strDataEnd Sub
\u524d\u9762\u58f0\u660e\u65f6\u8981\u58f0\u660e\u6210\u53ef\u53d8\u6570\u7ec4 Dim jsDATA\uff08\uff09 as byte
\u63a5\u6536\u4e8b\u4ef6\u524d\u8981\u91cd\u65b0\u58f0\u660e\uff1aredim jsDATA\uff08bytesTotal) as byte
\u4f60\u6700\u597d\u4e5f\u628abytesTotal\u7684\u6570\u7ec4\u663e\u793a\u51fa\u6765\uff0c\u76d1\u63a7\u4e00\u4e0b\u662f\u4e0d\u662f15\u4e2a\u5b57\u8282
Option Explicit
Private Sub Command1_Click()
If Text3.Text = "" Then
MsgBox "请输入对方IP", vbOKOnly, "提示"
Exit Sub
End If
If Text2.Text = "" Then
MsgBox "请输入要发送的内容", vbOKOnly, "提示"
Exit Sub
End If
Winsock1.RemoteHost = Text3.Text
Dim a As String
'a = Text2.Text
Winsock1.SendData Text2.Text
Text1.Text = Text1.Text & vbCrLf & "我：" & Text2.Text
Text2.Text = ""
End Sub
Private Sub Form_Load()
Text4.Text = Winsock1.LocalIP
Text3.Text = ""
Winsock1.RemotePort = 2011远程端口
Winsock1.LocalPort = 2011本地端口
Winsock1.Bind 2011绑定端口
Text4.Text = Winsock1.LocalIP
End Sub
Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)
On Error Resume Next '接收错误则继续执行
Dim a As String
Winsock1.GetData a
Text1.Text = Text1.Text & vbCrLf & "对方：" & a
End Sub
这里的端口是预设好的，IP是可变的，你可以自己改一下，加两个文本框就行了
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