FIX: Crash When Resizing Column of Split DBGrid

• Microsoft Visual Basic Professional and Enterprise Editions for Windows, version 5.0
• Microsoft Visual Studio 97
• Microsoft Visual C++, 32-bit Editions, version 5.0

SYMPTOMS

When attempting to resize a column of a DBGrid that has been split using the Split method, your application crashes with an error such as:

   PROJECT1.EXE - Application Error
   The instruction at "0x019800F0" referenced memory at "0x9998F0D8".
   The memory could not be "written".

   -or-

   PROJECT1.EXE
   This program has performed an illegal operation and will be shut down.
   If the problem persists, contact the program vendor.
   PROJECT1 caused an invalid page fault in module <unknown> at
   0000:FFFFFFFF

CAUSE

DBGRID32.OCX version 5.00.3714 does not handle window ownership correctly when re-sizing columns.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in the version 5.00.3817 of DBGRID32.OCX that ships in Visual Studio Service Pack 1.

For additional information about the Visual Studio 97 Service Pack 1, please see the following article in the Microsoft Knowledge Base:

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

MORE INFORMATION

Steps to Reproduce Behavior

1. Start a new Standard EXE project.

2. Add DBGrid to the project.

3. Place an instance of DBGrid on the default form (DBGrid1 by default).

4. Place a data control on the form (Data1 by default).

5. Set the Database property of the data control to point at BIBLIO.MDB.

6. Set the RecordSource property to Publishers.

7. Set the DBGrid DataSource property to Data1.

8. Add the following code to the Form Load event:

         Private Sub Form_Load()
            DBGrid1.Splits.Add (1)
         End Sub
   
   

9. Run the application.

10. Resize the first column header as small as possible.

11. Try resizing the first column header as small as possible again.

Keywords          : vb5all VB5FixlistSP1 VS97FixlistSP3 VS97FixlistSP2 VS97FixlistSP1 VB5FixlistSP2
Version           : 5.0 97
Platform          : NT WINDOWS
Issue type        : kbbug
Solution Type     : kbfix kbservicepack