Microsoft KB Archive/171546

= FIX: VB4 Apps with Unbound DBGrid Fail with VB5 DBGrid =

Article ID: 171546

Article Last Modified on 3/2/2005

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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
 * Microsoft Visual Basic 4.0 Standard Edition
 * Microsoft Visual Basic 4.0 Professional Edition
 * Microsoft Visual Basic 4.0 32-Bit Enterprise Edition

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This article was previously published under Q171546



SYMPTOMS
When using Visual Basic 4.0 with an Unbound DBGrid and the Visual Basic 5.0 DBGrid32.ocx, data does not get cached correctly. This results in invalid rows being displayed in the grid.

For example, an application using the Visual Basic 4.0 version would correctly display three rows of data. The same application would display only one row of data once the Visual Basic 5.0 version of the DBGrid control is installed.



CAUSE
This problem is caused by a bug in the Visual Basic 5.0 Data Bound Grid Controls (DBGrid32.ocx) in the version that ships with the product (5.00.3714) and in the version that ships with Visual Studio 97 Service Pack 1 (5.00.3817). Visual Studio 97 Service Pack 2 did not include an updated version of the control.



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 3.

For more information, 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 3, please see the following article in the Microsoft Knowledge Base:

175450 : INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 3



MORE INFORMATION
This problem does not occur if the application that uses the DBGrid control has been built with Visual Basic 5.0.

This problem also does not occur if the application built by Visual Basic 4.0 is a 16-bit application. That application would use the 16-bit DBGrid control and would be unaffected by this problem in the 32-bit version of the control.

Keywords: kbbug kbfix kb32bitonly kbvs97sp2fix kbvbp500sp3fix KB171546

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