PRB: MFC Classes Removed from OLE CDK Runtime DLLs (122291)
The information in this article applies to:
- Microsoft OLE Control Developer's Kit (CDK)
This article was previously published under Q122291 SYMPTOMS
The OLE control runtime DLLs contain a subset of the full MFC library. If
you attempt to instantiate a class that is unavailable, the compiler will
generate the following (or similar) error messages:
error C2501: 'CRecordSet' : missing decl-specifiers
error C2239: unexpected token 'identifier' following declaration of
'CRecordSet'
error C2061: syntax error : identifier 'recordset'
CAUSE
The errors occur because preprocessor directives are used to remove several
MFC class definitions from the MFC header files when building an OLE
control.
RESOLUTION
You can prevent these errors from occuring by simply not declaring any
instances of classes listed in the More Information section. The classes
are not available for OLE controls.
STATUS
This behavior is by design.
MORE INFORMATION
The following lists the general-purpose MFC classes that are unavailable
for OLE controls:
CDocTemplate
CDocItem
CMDIFrameWnd
CMDIChildWnd
CMultipleDocTemplate
CDocTemplate
COleBusyDialog
COleChangeIconDialog
COleClientItem
COleConvertDialog
COleDialog
COleDocument
COleFrameHook
COleInsertDialog
COleIPFrameWnd
COleLinkingDoc
COleLinksDialog
COleMessageFilter
COlePasteSpecialDialog
COleServerDoc
COleServerItem
COleTemplateServer
COleUpdateDialog
Also, all MFC database classes are unavailable in version 1.0 of the CDK,
including:
CDatabase
CRecordSet
CRecordView
CLongBinary
CFieldExchange
CDBException
NOTE: The database classes are now included in version 1.1 of the CDK.
| Modification Type: | Minor | Last Reviewed: | 8/16/2005 |
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| Keywords: | KB122291 |
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