Microsoft KB Archive/160909

= FIX: Binder95 Does Not Show an MFC DocObject Server Icon =

Article ID: 160909

Article Last Modified on 11/18/2003

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APPLIES TO


 * Microsoft Visual C++ 4.2 Professional Edition
 * Microsoft Visual C++ 5.0 Enterprise Edition
 * Microsoft Visual C++ 5.0 Professional Edition

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This article was previously published under Q160909



SYMPTOMS
Starting with Visual C++ 4.2, MFC provides support for creating Document Object (DocObject) Servers. The Binder application that comes with Microsoft Office '95 is a DocObject container. When you insert a DocObject server created by Visual C++ into the Binder, the defined icon for the document may not show up as expected.



CAUSE
The Binder application that comes with Microsoft Office '95 searches the registry for the CLSID of the DocObject server looking for the DefaultExtension key. It expects a certain format for this key to successfully display the correct icon. The MFC COleTemplateServer::UpdateRegistry function does not register the information in this format.



RESOLUTION
The resolution involves changing the DefaultExtension key to the format that Binder expects after UpdateRegistry is called. The sample code below demonstrates how this can be done. The code that accomplishes this is copied almost verbatim from the source code of COleTemplateServer::UpdateRegistry.



STATUS
This problem was corrected in Visual C++ version 6.0 for Windows



MORE INFORMATION
The following shows the difference between the DefaultExtension keys of an Office '95 application and an AppWizard generated application:

Excel Worksheet:

DefaultExtension = .xls, Excel Workbook (*.xls) AppWizard app named 'Test' with .tst extension: DefaultExtension = Test, Test Files (*.tst)

If you change the DefaultExtension key of the AppWizard app to read as follows DefaultExtension = .tst, Test Files (*.tst) the Binder will then display the icon defined for the document object.

Sample Code
/* Compile options needed: None

/* The following code can be added to the InitInstance of the CWinApp derived class right after the call to UpdateRegistry

// change the DefaultExtension to work with Binder95. // Get registration info from document template string. CString strServerName; CString strLocalServerName; CString strLocalShortName; CString strLocalFilterName; CString strLocalFilterExt;

if (!pDocTemplate->GetDocString(strServerName, CDocTemplate::regFileTypeId) || strServerName.IsEmpty) {        TRACE0("Error: not enough information in DocTemplate to register"                " OLE server.\n"); }  if (!pDocTemplate->GetDocString(strLocalServerName, CDocTemplate::regFileTypeName)) strLocalServerName = strServerName;    // use non-localized name

if (!pDocTemplate->GetDocString(strLocalShortName, CDocTemplate::fileNewName)) strLocalShortName = strLocalServerName; // use long name

pDocTemplate->GetDocString(strLocalFilterName,     CDocTemplate::filterName); pDocTemplate->GetDocString(strLocalFilterExt, CDocTemplate::filterExt);

ASSERT(strServerName.Find(' ') == -1); // no spaces allowed

// place entries in system registry LPCTSTR Arr[2]; CString strDefExt("CLSID\\%1\\DefaultExtension"); CString strEntry = strDefExt + (TCHAR)NULL + strLocalFilterExt + "," + strLocalFilterName; Arr[0] = strEntry; Arr[1] = NULL; if (!AfxOleRegisterServerClass(m_server.GetClassID, strServerName, strLocalShortName, strLocalServerName, OAT_DOC_OBJECT_SERVER, NULL, Arr)) {     // not fatal (don't fail, just warn) AfxMessageBox(AFX_IDP_FAILED_TO_AUTO_REGISTER); }

Additional query words: DocObject ActiveX

Keywords: kbbug kbfix kbregistry kbnoupdate kbactivedocs kbvc600fix KB160909

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