DOCUMENT:Q148139 06-MAY-2001 [visualc] TITLE :FIX: Default OLE Container w/ Splitters Faults on View Closure PRODUCT :Microsoft C Compiler PROD/VER:winnt:4.0,4.1,4.2 OPER/SYS: KEYWORDS:kbole kbwizard kbActiveX kbCOMt kbContainer kbMFC kbVC400bug kbVC410bug kbVC420bug kbVC ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - The AppWizard, included with: - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1 - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 ------------------------------------------------------------------------------- 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. 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. 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); } } 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. MORE INFORMATION ================ 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" (without the quotation marks) check box in the "Windows Styles" (without the quotation marks) tab of the "Advanced Options" (without the quotation marks) dialog box in Step 4. 2. Build a DEBUG version of the application, and run it. 3. Click "Insert New Object" (without the quotation marks) on the "Edit" (without the quotation marks) 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 : kbole kbwizard kbActiveX kbCOMt kbContainer kbMFC kbVC400bug kbVC410bug kbVC420bug kbVC500fix kbGrpDSMFCATL kbNoUpdate Technology : kbVCsearch kbAudDeveloper kbAppWizard Version : winnt:4.0,4.1,4.2 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.