Microsoft KB Archive/148139

= FIX: Default OLE Container w/ Splitters Faults on View Closure =

Article ID: 148139

Article Last Modified on 12/9/2003

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APPLIES TO

 The AppWizard, when used with:  Microsoft Visual C++ 4.0 Standard Edition

 Microsoft Visual C++ 4.1 Subscription

 Microsoft Visual C++ 4.2 Enterprise Edition

 Microsoft Visual C++ 4.2 Professional Edition</li></ul> </li></ul>

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This article was previously published under Q148139

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SYMPTOMS
An AppWizard application generated with OLE Container and Splitter Window support will generate an Access Violation when a splitter pane containing an in-place active item is closed. The Access Violation occurs when you try to call m_pView->AssertValid from the COleClientItem::AssertValid function.

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CAUSE
The AppWizard fails to add an OnDestroy member function to the view class to deactivate the in-place active object when the view containing the in-place active object is destroyed. When the view containing the active object is destroyed, the remaining view is resized. Because the object in the destroyed view was not properly deactivated, the subsequent call to GetInPlaceActiveObject in the view's OnSize function erroneously detects an in-place active COleClientItem object.

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RESOLUTION
To work around the problem, add the following handler for the WM_DESTROY message to your view class: void CYourView::OnDestroy {  CView::OnDestroy;

COleClientItem* pActiveItem = GetDocument->GetInPlaceActiveItem(this); if (pActiveItem != NULL && pActiveItem->GetActiveView == this) {     pActiveItem->Deactivate; ASSERT(GetDocument->GetInPlaceActiveItem(this) == NULL); } }

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STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem has been fixed in Visual C++ version 5.0.

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Steps to Reproduce Problem

 * 1) Create an SDI or MDI application with AppWizard. Select OLE Container support in Step 3, and select the Use split window check box in the Windows Styles tab of the Advanced Options dialog box in Step 4.
 * 2) Build a DEBUG version of the application, and run it.
 * 3) Click Insert New Object on the Edit menu, and insert an object that supports in-place activation. For example, use Microsoft Word or Microsoft Excel. The object should appear in the container application and be activated in-place.
 * 4) Split the container's view window. You should see two objects, one of which is in-place active and the other of which is a copy of the in-place active object.
 * 5) Drag the splitter bar so that the view containing the in-place active object is removed and destroyed. As a result, an unhandled exception Access Violation occurs in COleClientItem::AssertValid.

Additional query words: kbVC400bug GP fault GPF

Keywords: kbbug kbfix kbnoupdate kbcontainer kbvc500fix kbwizard KB148139

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