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ATL_NO_VTABLE
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ATL_URL Flags
ATL_URL_SCHEME
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ATLENSURE
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ATLSMTP_QPENCODE Flags
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ATLTRACE
ATLTRACE2
ATLTRACENOTIMPL
BEGIN_CATEGORY_MAP
BEGIN_COM_MAP
BEGIN_CONNECTION_POINT_MAP
BEGIN_EXTENSION_SNAPIN_NODEINFO_MAP
BEGIN_MSG_MAP
BEGIN_PROP_MAP
BEGIN_RDX_MAP
BEGIN_SERVICE_MAP
BEGIN_SINK_MAP
BEGIN_SNAPINTOOLBARID_MAP
CHAIN_MSG_MAP
CHAIN_MSG_MAP_ALT
CHAIN_MSG_MAP_ALT_MEMBER
CHAIN_MSG_MAP_DYNAMIC
CHAIN_MSG_MAP_MEMBER
COM_INTERFACE_ENTRY
COM_INTERFACE_ENTRY Macros
COM_INTERFACE_ENTRY_AGGREGATE
COM_INTERFACE_ENTRY_AGGREGATE_BLIND
COM_INTERFACE_ENTRY_AUTOAGGREGATE
COM_INTERFACE_ENTRY_AUTOAGGREGATE_BLIND
COM_INTERFACE_ENTRY_BREAK
COM_INTERFACE_ENTRY_CACHED_TEAR_OFF
COM_INTERFACE_ENTRY_CHAIN
COM_INTERFACE_ENTRY_FUNC
COM_INTERFACE_ENTRY_FUNC_BLIND
COM_INTERFACE_ENTRY_IID
COM_INTERFACE_ENTRY_NOINTERFACE
COM_INTERFACE_ENTRY_TEAR_OFF
COM_INTERFACE_ENTRY2
COM_INTERFACE_ENTRY2_IID
COMMAND_CODE_HANDLER
COMMAND_HANDLER
COMMAND_ID_HANDLER
COMMAND_RANGE_CODE_HANDLER
COMMAND_RANGE_HANDLER
CONNECTION_POINT_ENTRY
DECLARE_AGGREGATABLE
DECLARE_CLASSFACTORY
DECLARE_CLASSFACTORY_AUTO_THREAD
DECLARE_CLASSFACTORY_EX
DECLARE_CLASSFACTORY_SINGLETON
DECLARE_CLASSFACTORY2
DECLARE_EMPTY_MSG_MAP
DECLARE_GET_CONTROLLING_UNKNOWN
DECLARE_LIBID
DECLARE_NO_REGISTRY
DECLARE_NOT_AGGREGATABLE
DECLARE_OBJECT_DESCRIPTION
DECLARE_OLEMISC_STATUS
DECLARE_ONLY_AGGREGATABLE
DECLARE_POLY_AGGREGATABLE
DECLARE_PROTECT_FINAL_CONSTRUCT
DECLARE_REGISTRY
DECLARE_REGISTRY_APPID_RESOURCEID
DECLARE_REGISTRY_RESOURCE
DECLARE_REGISTRY_RESOURCEID
DECLARE_VIEW_STATUS
DECLARE_WND_CLASS
DECLARE_WND_CLASS_EX
DECLARE_WND_SUPERCLASS
DEFAULT_REFLECTION_HANDLER
DEVMODE and TEXTMETRIC String Conversion Macros
END_CATEGORY_MAP
END_COM_MAP
END_CONNECTION_POINT_MAP
END_EXTENSION_SNAPIN_NODEINFO_MAP
END_MSG_MAP
END_PROP_MAP
END_RDX_MAP
END_SERVICE_MAP
END_SINK_MAP
END_SNAPINTOOLBARID_MAP
EXTENSION_SNAPIN_DATACLASS
EXTENSION_SNAPIN_NODEINFO_ENTRY
FORWARD_NOTIFICATIONS
IMPLEMENTED_CATEGORY
MESSAGE_HANDLER
MESSAGE_RANGE_HANDLER
NOTIFY_CODE_HANDLER
NOTIFY_HANDLER
NOTIFY_ID_HANDLER
NOTIFY_RANGE_CODE_HANDLER
NOTIFY_RANGE_HANDLER
OBJECT_ENTRY_AUTO
OBJECT_ENTRY_NON_CREATEABLE_EX_AUTO
PROP_DATA_ENTRY
PROP_ENTRY_INTERFACE
PROP_ENTRY_INTERFACE_CALLBACK
PROP_ENTRY_INTERFACE_CALLBACK_EX
PROP_ENTRY_INTERFACE_EX
PROP_ENTRY_TYPE
PROP_ENTRY_TYPE_EX
PROP_PAGE
RDX_BINARY
RDX_CSTRING_TEXT
RDX_DWORD
RDX_TEXT
REFLECT_NOTIFICATIONS
REFLECTED_COMMAND_CODE_HANDLER
REFLECTED_COMMAND_HANDLER
REFLECTED_COMMAND_ID_HANDLER
REFLECTED_COMMAND_RANGE_CODE_HANDLER
REFLECTED_COMMAND_RANGE_HANDLER
REFLECTED_NOTIFY_CODE_HANDLER
REFLECTED_NOTIFY_HANDLER
REFLECTED_NOTIFY_ID_HANDLER
REFLECTED_NOTIFY_RANGE_CODE_HANDLER
REFLECTED_NOTIFY_RANGE_HANDLER
REQUIRED_CATEGORY
SERVICE_ENTRY
SERVICE_ENTRY_CHAIN
SINK_ENTRY
SINK_ENTRY_EX
SINK_ENTRY_INFO
SNAPINMENUID
SNAPINTOOLBARID_ENTRY
WM_FORWARDMSG
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BEGIN_COM_MAP

Visual Studio 2012

The COM map is the mechanism that exposes interfaces on an object to a client through QueryInterface.

Copy 
BEGIN_COM_MAP( x )
x

[in] The name of the class object you are exposing interfaces on.

CComObjectRootEx::InternalQueryInterface only returns pointers for interfaces in the COM map. Start your interface map with the BEGIN_COM_MAP macro, add entries for each of your interfaces with the COM_INTERFACE_ENTRY macro or one of its variants, and complete the map with the END_COM_MAP macro.

From the ATL BEEPER sample:

C++
Copy 
BEGIN_COM_MAP(CBeeper)
   COM_INTERFACE_ENTRY(IBeeper)
   COM_INTERFACE_ENTRY(IDispatch)
   COM_INTERFACE_ENTRY_TEAR_OFF(IID_ISupportErrorInfo, CBeeper2)
END_COM_MAP()

Header: atlcom.h

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