vb.net进程间通讯,winform进程间通讯

各们,请教怎么使用vb.net编写两个进程间消息

两个方法

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1.

要接收的窗口先使用FindWindow这个api获得句柄

调用SetForegroundWindow使其获得焦点并选中

调用.net方法:SendKeys.Send方法发送

2.使用API的SendInput

怎样在两个VB程序之间传递信息?

可以用动态数据交换(Dynamic Data Exchange,DDE)实现进程之间的通信。

发送端:

添加Command1,Text1控件,Text1的内容用于发送。

代码如下:

Private Sub Command1_Click()

Dim t As Long

Text1.LinkMode = 0

Text1.LinkTopic = "Child|FrmChild" '注意此处一定与接收的程序名称和连接的标题相同否则连接不成功。

Text1.LinkMode = 2

Text1.LinkExecute Text1.Text

t = Text1.LinkTimeout

Text1.LinkTimeout = 1

Text1.LinkMode = 0

Text1.LinkTimeout = t

End Sub

接收端:

添加Text1控件,Text1的内容用于接收。设置工程名称为Child(与发送的程序名对应),设置窗体的LinkMode属性为1,LinkTopic为FrmChild(对应上面发送的标题)。

Private Sub Form_LinkExecute(CmdStr As String, Cancel As Integer)

Text1 = CmdStr

Cancel = 0

End Sub

编译后,先运行接收端,然后运行发送端,输入内容,发送即可成功。

用vb.net实现网络通信

用 vb.net socket通信

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


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