Microsoft KB Archive/257741

= FIX: UserControl Validate Event Hangs the VB IDE =

Article ID: 257741

Article Last Modified on 8/7/2007

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APPLIES TO

 Microsoft Visual Basic 6.0 Professional Edition, when used with:  Microsoft Windows 95

 Microsoft Windows 98 Standard Edition

 Microsoft Windows Millennium Edition  Microsoft Visual Basic 6.0 Enterprise Edition, when used with:  Microsoft Windows 95</li></ul>

 Microsoft Windows 98 Standard Edition</li></ul>

 Microsoft Windows Millennium Edition</li></ul> </li></ul>

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This article was previously published under Q257741

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SYMPTOMS
If a UserControl has a control with code in the Validate event, and it is sited on a form in a Standard EXE project, the project causes the system to lock up when it is run in the Visual Basic integrated development environment (IDE). This problem only occurs on Windows 95, Windows 98, or Windows Me computers.

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STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article. This bug was corrected in the latest service pack for Visual Studio 6.0.

For additional information about Visual Studio service packs, click the following article numbers to view the articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed

To download the latest Visual Studio service pack, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/vstudio/Aa718353.aspx

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Steps to Reproduce Behavior
<ol> Start a new Standard EXE project in Visual Basic. Form1 is created by default.</li> From the Project menu, add a new UserControl to the project.</li> Add a TextBox control and a Label control to the UserControl.</li>  Paste the following code into the Code window of UserControl1: Option Explicit

Private Sub Text1_Validate(Cancel As Boolean) MsgBox "Text1_Validate" End Sub </li> Close the designer of the UserControl, and then place an instance of it on Form1.</li> Save and run the project.</li> Click on Label1. Your Visual Basic IDE should lock up.</li></ol>

Additional query words: sp4

Keywords: kbactivexevents kbbug kbfix kbideproject kbvs600sp4fix kbvs600sp5fix KB257741

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