PRB: Formset with Modal Windows Containing OCX Hangs VFP

 Last reviewed: February 5, 1998
Article ID: Q180497
The information in this article applies to:
  • Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a

SYMPTOMS

Repeatedly switching the focus between forms using the mouse or CTRL-F1 in a modal formset that has two or more forms with OCX controls causes Visual FoxPro to freeze.

STATUS

Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

A list of the ActiveX controls that have been confirmed to cause this behavior is shown below; however, other ActiveX controls may also cause this behavior.

Here are the four controls that have caused this behavior:

  • Outline.ocx
  • Treeview.ocx
  • MSDataGrid.ocx
  • MSDataCombobox.ocx

This problem occurs only if the focus of the forms is changed using the mouse or the CTRL-F1 combination. Using the TAB key or programmatically calling a form object's SetFocus method will not cause this problem.

Steps to Reproduce Behavior

WARNING: After running this code you will be unable to close Visual FoxPro through normal means. Use Task Manager in Windows NT or the Close Program dialog box in Windows 95 to close Visual FoxPro. Before running this code, close all running applications and save your data. To close all open applications, press CTRL+ALT+DELETE to open the Windows Task Manager or Close Program dialog box, and then close all the other applications you have running. Note that following the steps below may produce lost allocation units, lost clusters, or cross-linked files.

  1. Create a formset and set the Window Type property to MODAL.

  2. Add two or more forms that each contain the Outline.ocx.

  3. Run the formset and change the focus from the first form to the second form using either the mouse or CTRL-F1 and then give the focus to the first form. Repeat this operation several times. Eventually, Visual FoxPro freezes. 

Keywords          : FxinteropOcx FxtoolFormdes vfoxwin vfp50abug vfp50bug
Version           : WINDOWS:5.0,5.0a
Platform          : WINDOWS
Issue type        : kbprb

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Last reviewed: February 5, 1998
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