'发送端：
'By wgscd

Dim sendsocket As New Net.Sockets.Socket(Net.Sockets.AddressFamily.InterNetwork, Net.Sockets.SocketType.Stream, Net.Sockets.ProtocolType.Tcp)
'实例化socket
Dim ipendpiont As New Net.IPEndPoint(Net.IPAddress.Parse("127.0.0.1"), 8888) '建立终结点
'OpenFileDialog1.ShowDialog()
Dim fs As New IO.FileStream("c:\wgscd.dat", IO.FileMode.OpenOrCreate, IO.FileAccess.Read) '要传输的文件
Dim fssize(fs.Length - 1) As Byte
Dim strread As New IO.BinaryReader(fs) '流处理要传输的文件
'fs.Read(fssize, 0, fssize.Length - 1)
strread.Read(fssize, 0, fssize.Length - 1)
sendsocket.Connect(ipendpiont) '连接远程计算机
sendsocket.Send(fssize) '发送文件
Label1.Text = fs.Length()
fs.Close()
sendsocket.Shutdown(Net.Sockets.SocketShutdown.Send)
'关闭发送连接
sendsocket.Close() '关闭本机socket
=======================================

接收端：
Dim receivesocket As New Net.Sockets.Socket(Net.Sockets.AddressFamily.InterNetwork,Net.Sockets.SocketType.Stream,Net.Sockets.ProtocolType.Tcp)
Private Sub Form1_Load(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles MyBase.Load
Dim hostipendpiont As New Net.IPEndPoint(Net.IPAddress.Parse("127.0.0.1"), 8888)
receivesocket.Bind(hostipendpiont)
'建立远程计算机的的socket
receivesocket.Listen(2) '监听socket
End Sub

Private Sub Button1_Click(ByVal sender As Object,ByVal e As System.EventArgs) Handles Button1.Click

Dim recbyte(229888990) As Byte
Dim hostsocket As Net.Sockets.Socket = receivesocket.Accept()
'同意和发送端计算机建立连接

hostsocket.Receive(recbyte)
If hostsocket.Receive(recbyte) > 0.1 Then
MsgBox("yyyyy" & hostsocket.Receive(recbyte))
End If

Dim recfs As New IO.FileStream("c:\wgscd2.dat", IO.FileMode.OpenOrCreate)
'接收数据并将其保存到一个新的文件中


Dim newfilestr As New IO.BinaryWriter(recfs) '流写
'recfs.Write(recbyte, 0, recbyte.Length - 1)
newfilestr.Write(recbyte, 0, recbyte.Length - 1)
recfs.Close()
hostsocket.Shutdown(Net.Sockets.SocketShutdown.Receive)
hostsocket.Close()
End Sub