Microsoft KB Archive/171818

= FIX: IDE Crashes When Repeatedly Placing a Control on a Form =

Article ID: 171818

Article Last Modified on 12/10/2003

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APPLIES TO


 * Microsoft Visual Basic 5.0 Control Creation Edition
 * Microsoft Visual Basic 5.0 Learning Edition
 * Microsoft Visual Basic 5.0 Professional Edition
 * Microsoft Visual Basic 5.0 Enterprise Edition

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This article was previously published under Q171818



SYMPTOMS
When you select a control from the Toolbox with the mouse, immediately press the ENTER key to create the control instance on a form, UserDocument, or property page, and then quickly click on the Toolbox again, the following error may occur:

"VB5 has created an invalid page fault in module VB5.EXE at 0137:00568412"



CAUSE
The problem is that the Toolbox registers the two single clicks as a double click. It then assumes that the control to be created has already been selected by the first click. However, when the ENTER key was pressed between the two clicks, the control selection was set back to 0, so the correct control is no longer selected when the second click occurs.



RESOLUTION
Install the Visual Studio 97 Service Pack 2 or allow time for the control to be created before clicking on the Toolbox again.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

171554 INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 2



MORE INFORMATION
This behavior occurs whenever you click a control on the Toolbox, hit the ENTER key to create the control, and then click on the Toolbox again within the space and time limit of a double-click.

NOTE: This is easier to reproduce if the 'double-click' time set via the Control Panel is increased (set to slower).

Steps to Reproduce Behavior

 * 1) Create a new Visual Basic 5.0 Standard EXE project.
 * 2) Click on a control in the Toolbox, immediately press the ENTER key and then quickly click on the same control in the Toolbox.

An invalid page fault may occur if the second click occurs within the space and time limit of the double-click setting.

Keywords: kbbug kbfix kbvbp500sp2fix kbvs97sp2fix KB171818

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