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When you use the TCPClient.Connect method to connect to a user control that runs in a Web page, the method call may take a long time to finish. For example, the method call may take 100 seconds to finish. This problem occurs if the following conditions are true:
You use the TCPClient class in Microsoft Visual Basic .NET 2003.
The computer that you are using is running the Microsoft .NET Framework 1.1 Service Pack 1 (SP1).
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 1.1 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
You must have the Microsoft .NET Framework 1.1 SP1 installed to apply this hotfix.
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Steps to reproduce the problem
In Visual Studio .NET 2003, create a Windows Control Library project.
Add a Button control to the project.
Double-click the Button control, and then add the following code to the top of the page.
Imports System.Net.SocketsImports System.Net
Add the following code to the Click event of the Button control.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickMsgBox("I begin to connect...")Dim tcpc As TcpClientTrytcpc = New TcpClientDim objRemoteIp As IPAddress = IPAddress.Parse("<IIS server's IP address>")' Note: Use the actual IP address of the server that is running Microsoft Internet Information Services (IIS).tcpc.Connect(objRemoteIp, 80)MsgBox("connected")tcpc.Close()Catch ex As ExceptionMsgBox("There is an error:" & ex.Message)End TryEnd Sub
On the Build menu, click Build WindowsControlLibrary1.
Create an HTML file that contains the following code. Name the file Test.htm.