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Microsoft KB Archive/171547

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Knowledge Base


FIX: New DBGrid32.OCX Breaks VB4 Apps that Use VB4 Version

Article ID: 171547

Article Last Modified on 3/2/2005



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



This article was previously published under Q171547

SYMPTOMS

When a Visual Basic 5.0 application using the DBGrid32.ocx is installed on a machine that previously had a Visual Basic 4.0 application installed and was also using its version of the DbGrid32.ocx, an untrappable run-time error (-1)(ffffffff) may result when editing a cell within the Visual Basic 4.0 application. This behavior should not occur because the new DBGrid should be backwards-compatible.

You receive the following error messages:

Runtime Error -1, (ffffffff)


when you expect no error.

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 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: kberrmsg kbbug kbfix kb32bitonly kbvs97sp2fix kbvbp500sp3fix KB171547