Q305101: BUG: VB Modal Form Freezes When Called from DataGrid Click Event

Article: Q305101
Product(s): Microsoft Visual Basic for Windows
Version(s): 6.0,6.0 SP3,6.0 SP4,6.0 SP5
Operating System(s): 
Keyword(s): kbVBp600bug kbGrpDSVBDB kbDSupport
Last Modified: 13-AUG-2001

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The information in this article applies to:

- Microsoft Visual Basic Enterprise Edition for Windows, versions 6.0, 6.0 SP3, 6.0 SP4, 6.0 SP5 
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SYMPTOMS
========

When you open a Visual Basic form as modal on the Click event of a DataGrid
control, if you click on the header section instead of the grid cells, the form
freezes. This problem does not occur if you click on the grid cells.

RESOLUTION
==========

To work around this problem, disable the grid on the Click event, and enable the
grid on the modal form's Unload event.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a new Standard EXE project in Visual Basic. Create two forms (Form1
  and Form2).

2. From the Project menu, click Components, and select the "Microsoft ADO Data
  Control 6.0 (OLEDB)" and Microsoft DataGrid Control 6.0 (OLEDB) check boxes.

3. Add the following controls to Form1:

   - Microsoft ADO Data Control 6.0 (OLEDB)
   - Microsoft DataGrid Control 6.0 (OLEDB)

4. Paste the following code into the code window of Form1:

  Private Sub DataGrid1_Click()
      'Me.DataGrid1.Enabled = False
      Form2.Show vbModal
  End Sub

5. Paste the following code into the code window of Form2:

  Private Sub Form_Unload(Cancel As Integer)
      Form1.DataGrid1.Enabled = True
  End Sub

6. Run the project, and click on the header of the DataGrid. Notice that the
  application freezes.

7. To work around this problem, uncomment the "Me.DataGrid1.Enabled = False"
  line in the "DataGrid1_Click" event of Form1, and run the project again.

Additional query words:

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Keywords          : kbVBp600bug kbGrpDSVBDB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600 kbVB600SP3 kbVB600SP4 kbVB600SP5
Version           : :6.0,6.0 SP3,6.0 SP4,6.0 SP5
Issue type        : kbbug
Solution Type     : kbpending

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