COMMAP Attributes Sample: Demonstrates COM Interface Map Entry Macros

The COMMAP attributes sample shows how different COM interface map entry macros are used.

Security noteSecurity Note

This sample code is intended to illustrate a concept, and it shows only the code that is relevant to that concept. It may not meet the security requirements for a specific environment, and it should not be used exactly as shown. We recommend that you add security and error-handling code to make your projects more secure and robust. Microsoft provides this sample code "AS IS" with no warranties.

To get samples and instructions for installing them:

To access samples from Visual Studio

  • On the Help menu, click Samples.

    By default, these samples are installed in drive:\Program Files\Microsoft Visual Studio 10.0\Samples\.

  • For the most recent version of this sample and a list of other samples, see Visual Studio Samples on the MSDN Web site.

To build and run this sample

  1. Open the solution file COMMap.sln.

  2. From the Build menu, clickBuild Solution.

  3. After the sample builds, open commap.htm in your Web browser. Commap.htm includes comments about each type of map entry.

This sample uses the following attributes:

  • COMMap   coclass, com_interface_entry, default, dual, emitidl, helpstring, id, implements_category, in, module, object, out, pointer_default, progid, propget, retval, threading, uuid, version, vi_progid

  • COMMap/Aggreg   coclass, default, dual, emitidl, helpstring, id, module, object, out, pointer_default, progid, propget, retval, support_error_info, threading, uuid, version, vi_progid

This sample uses the following keywords:

BEGIN_COM_MAP; CComCoClass; CComModule::GetClassObject; CComModule::GetLockCount; CComModule::Init; CComModule::RegisterServer; CComModule::Term; CComModule::UnregisterServer; CComObjectRoot; CComTearOffObjectBase; COM_INTERFACE_ENTRY; COM_INTERFACE_ENTRY_AGGREGATE; COM_INTERFACE_ENTRY_AGGREGATE_BLIND; COM_INTERFACE_ENTRY_AUTOAGGREGATE; COM_INTERFACE_ENTRY_AUTOAGGREGATE_BLIND; COM_INTERFACE_ENTRY_CACHED_TEAR_OFF; COM_INTERFACE_ENTRY_TEAR_OFF; DECLARE_GET_CONTROLLING_UNKNOWN; DECLARE_REGISTRY_RESOURCEID; DisableThreadLibraryCalls; END_COM_MAP; IDispatchImpl; ISupportErrorInfo; SysAllocString

NoteNote

Some of the samples, such as this one, have not been modified to reflect the changes in the Visual C++ wizards, libraries, and compiler, but still demonstrate how to complete your desired task.

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