FIX: VB4 Apps with Unbound DBGrid Fail with VB5 DBGrid

• Microsoft Visual Basic Control Creation, Learning, Professional, and Enterprise Editions for Windows, version 5.0
• Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 32-bit only, for Windows, version 4.0
• Microsoft Visual Studio versions 97, 97sp1

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:

Q170365 : INFO: Visual Studio 97 Service Packs - What, Where, and Why

Q175450 : 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 : kbVBp400 kbVBp500 kbVS97sp2fix kbGrpVBDB VB4WIN kb32bitOnly kbvbp500sp3fix
Version : WINDOWS:4.0,5.0; WINNT:97,97sp1
Platform : WINDOWS winnt
Issue type : kbbug