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Q199385: PRB: Active OLE Control Prevents Logging Off or Shutting Down

Article: Q199385
Product(s): Microsoft Visual Basic for Windows
Version(s): WINDOWS:5.0,6.0
Operating System(s): 
Keyword(s): kbole kbOLEApp kbVBp kbVBp500 kbVBp600 kbGrpDSVB kbDSupport
Last Modified: 11-JAN-2001

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The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
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SYMPTOMS
========

When an OLE control with an embedded OCX control is active, the application
prevents logging off or shutting down a machine. OLE cancels shutdown before
your Visual Basic application gets a Query Unload event.

CAUSE
=====

To prevent data loss, OLE prevents exiting an application while an OLE provider
is active for editing.

STATUS
======

This behavior is by design.

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

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

1. Create a new ActiveX Control project in Visual Basic. UserControl1 is created
  by default.

2. Place a CommandButton (Command1) on to UserControl1.

3. Paste the following code into the code module for UserControl1:

  Private Sub UserControl_Resize()
     Command1.Move 0, 0, ScaleWidth, ScaleHeight
  End Sub

4. From the File menu, select Make Project1.ocx to compile Project1.

5. Create a new Standard EXE project (save the changes to the ActiveX Control
  project, if desired), add a reference to the just-created OCX by selecting it
  from the Components window. Note that you need to change the project name in
  order to add the Project1 control.

6. Place an instance of the OLE control onto Form1. The control is given the
  name OLE1 by default. Leave the OLE control empty.

7. Paste the following code into the code module for Form1:

  Private Sub Form_Load()
     OLE1.CreateEmbed "", "Project1.UserControl1"
     OLE1.DoVerb vbOLEShow
  End Sub

8. Run the application, and click on OLE1 to activate the control.

9. Log off or shut down the system.

Note that you cannot log off or shut the machine down because the ActiveX control
is active for editing.

Additional query words:

======================================================================
Keywords          : kbole kbOLEApp kbVBp kbVBp500 kbVBp600 kbGrpDSVB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB500Search kbVB600Search kbVBA500 kbVBA600 kbVB500 kbVB600
Version           : WINDOWS:5.0,6.0
Issue type        : kbprb

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