ATL Classes

Article
04/22/2008

The Active Template Library (ATL) includes the following classes. To find a particular class by category, see the ATL Class Overview.

Class	Description	Header file
CA2AEX	This class is used by the string conversion macros CA2TEX and CT2AEX, and the typedef CA2A.	atlconv.h
CA2CAEX	This class is used by string conversion macros CA2CTEX and CT2CAEX, and the typedef CA2CA.	atlconv.h
CA2WEX	This class is used by the string conversion macros CA2TEX, CA2CTEX, CT2WEX, and CT2CWEX, and the typedef CA2W.	atlconv.h
CAccessToken	This class is a wrapper for an access token.	atlsecurity.h
CAcl	This class is a wrapper for an ACL (access-control list) structure.	atlsecurity.h
CAdapt	This template is used to wrap classes that redefine the address-of operator to return something other than the address of the object.	atlcomcli.h
CAtlArray	This class implements an array object.	atlcoll.h
CAtlAutoThreadModule	This class implements a thread-pooled, apartment-model COM server.	atlbase.h
CAtlAutoThreadModuleT	This class provides methods for implementing a thread-pooled, apartment-model COM server.	atlbase.h
CAtlBaseModule	This class is instantiated in every ATL project.	atlcore.h
CAtlComModule	This class implements a COM server module.	atlbase.h
CAtlDebugInterfacesModule	This class provides support for debugging interfaces.	atlbase.h
CAtlDllModuleT	This class represents the module for a DLL.	atlbase.h
CAtlException	This class defines an ATL exception.	atlexcept.h
CAtlExeModuleT	This class represents the module for an application.	atlbase.h
CAtlFile	This class provides a thin wrapper around the Windows file-handling API.	atlfile.h
CAtlFileMapping	This class represents a memory-mapped file, adding a cast operator to the methods of CAtlFileMappingBase.	atlfile.h
CAtlFileMappingBase	This class represents a memory-mapped file.	atlfile.h
CAtlList	This class provides methods for creating and managing a list object.	atlcoll.h
CAtlMap	This class provides methods for creating and managing a map object.	atlcoll.h
CAtlModule	This class provides methods used by several ATL module classes.	atlbase.h
CAtlModuleT	This class implements an ATL module.	atlbase.h
CAtlServiceModuleT	This class implements a service.	atlbase.h
CAtlTemporaryFile	This class provides methods for the creation and use of a temporary file.	atlfile.h
CAtlWinModule	This class provides support for ATL windowing components.	atlbase.h
CAutoPtr	This class represents a smart pointer object.	atlbase.h
CAutoPtrArray	This class provides methods useful when constructing an array of smart pointers.	atlbase.h
CAutoPtrElementTraits	This class provides methods, static functions, and typedefs useful when creating collections of smart pointers.	atlcoll.h
CAutoPtrList	This class provides methods useful when constructing a list of smart pointers.	atlcoll.h
CAutoVectorPtr	This class represents a smart pointer object using vector new and delete operators.	atlbase.h
CAutoVectorPtrElementTraits	This class provides methods, static functions, and typedefs useful when creating collections of smart pointers using vector new and delete operators.	atlcoll.h
CAxDialogImpl	This class implements a dialog box (modal or modeless) that hosts ActiveX controls.	atlwin.h
CAxWindow	This class provides methods for manipulating a window hosting an ActiveX control.	atlwin.h
CAxWindow2T	This class provides methods for manipulating a window that hosts an ActiveX control and also has support for hosting licensed ActiveX controls.	atlwin.h
CBindStatusCallback	This class implements the IBindStatusCallback interface.	atlctl.h
CComAggObject	This class implements IUnknown for an aggregated object.	atlcom.h
CComAllocator	This class provides methods for managing memory using COM memory routines.	atlbase.h
CComApartment	This class provides support for managing an apartment in a thread-pooled EXE module.	atlbase.h
CComAutoCriticalSection	This class provides methods for obtaining and releasing ownership of a critical section object.	atlcore.h
CComAutoThreadModule	As of ATL 7.0, CComAutoThreadModule is obsolete: see ATL Modules for more details.	atlbase.h
CComBSTR	This class is a wrapper for BSTRs.	atlbase.h
CComCachedTearOffObject	This class implements IUnknown for a tear-off interface.	atlcom.h
CComClassFactory	This class implements the IClassFactory interface.	atlcom.h
CComClassFactory2	This class implements the IClassFactory2 interface.	atlcom.h
CComClassFactoryAutoThread	This class implements the IClassFactory interface and allows objects to be created in multiple apartments.	atlcom.h
CComClassFactorySingleton	This class derives from CComClassFactory and uses CComObjectGlobal to construct a single object.	atlcom.h
CComCoClass	This class provides methods for creating instances of a class and obtaining its properties.	atlcom.h
CComCompositeControl	This class provides the methods required to implement a composite control.	atlctl.h
CComContainedObject	This class implements IUnknown by delegating to the owner object's IUnknown.	atlcom.h
CComControl	This class provides methods for creating and managing ATL controls.	atlctl.h
CComControlBase	This class provides methods for creating and managing ATL controls.	atlctl.h
CComCriticalSection	This class provides methods for obtaining and releasing ownership of a critical section object.	atlcore.h
CComCritSecLock	This class provides methods for locking and unlocking a critical section object.	atlbase.h
CComCurrency	This class has methods and operators for creating and managing a CURRENCY object.	atlcur.h
CComDynamicUnkArray	This class stores an array of IUnknown pointers.	atlcom.h
CComEnum	This class defines a COM enumerator object based on an array.	atlcom.h
CComEnumImpl	This class provides the implementation for a COM enumerator interface where the items being enumerated are stored in an array.	atlcom.h
CComEnumOnSTL	This class defines a COM enumerator object based on an STL collection.	atlcom.h
CComFakeCriticalSection	This class provides the same methods as CComCriticalSection but does not provide a critical section.	atlcore.h
CComGITPtr	This class provides methods for dealing with interface pointers and the global interface table (GIT).	atlbase.h
CComHeap	This class implements IAtlMemMgr using the COM memory allocation functions.	ATLComMem.h
CComHeapPtr	A smart pointer class for managing heap pointers.	atlbase.h
CComModule	As of ATL 7.0, CComModule is obsolete: see ATL Modules for more details.	atlbase.h
CComMultiThreadModel	This class provides thread-safe methods for incrementing and decrementing the value of a variable.	atlbase.h
CComMultiThreadModelNoCS	This class provides thread-safe methods for incrementing and decrementing the value of a variable, without critical section locking or unlocking functionality.	atlbase.h
CComObject	This class implements IUnknown for a nonaggregated object.	atlcom.h
CComObjectGlobal	This class manages a reference count on the module containing your Base object.	atlcom.h
CComObjectNoLock	This class implements IUnknown for a nonaggregated object, but does not increment the module lock count in the constructor.	atlcom.h
CComObjectRoot	This typedef of CComObjectRootEx is templatized on the default threading model of the server.	atlcom.h
CComObjectRootEx	This class provides methods to handle object reference count management for both nonaggregated and aggregated objects.	atlcom.h
CComObjectStack	This class creates a temporary COM object and provides it with a skeletal implementation of IUnknown.	atlcom.h
CComPolyObject	This class implements IUnknown for an aggregated or nonaggregated object.	atlcom.h
CComPtr	A smart pointer class for managing COM interface pointers.	atlcomcli.h
CComPtrBase	This class provides a basis for smart pointer classes using COM-based memory routines.	atlcomcli.h
CComQIPtr	A smart pointer class for managing COM interface pointers.	atlcomcli.h
CComQIPtrElementTraits	This class provides methods, static functions, and typedefs useful when creating collections of COM interface pointers.	atlcoll.h
CComSafeArray	This class is a wrapper for the SAFEARRAY Data Type structure.	atlsafe.h
CComSafeArrayBound	This class is a wrapper for a SAFEARRAYBOUND structure.	atlsafe.h
CComSimpleThreadAllocator	This class manages thread selection for the class CComAutoThreadModule.	atlbase.h
CComSingleThreadModel	This class provides methods for incrementing and decrementing the value of a variable.	atlbase.h
CComTearOffObject	This class implements a tear-off interface.	atlcom.h
CComUnkArray	This class stores IUnknown pointers and is designed to be used as a parameter to the IConnectionPointImpl template class.	atlcom.h
CComVariant	This class wraps the VARIANT type, providing a member indicating the type of data stored.	atlcomcli.h
CContainedWindowT	This class implements a window contained within another object.	atlwin.h
CCRTAllocator	This class provides methods for managing memory using CRT memory routines.	atlcore.h
CCRTHeap	This class implements IAtlMemMgr using the CRT heap functions.	atlmem.h
CDacl	This class is a wrapper for a DACL (discretionary access-control list) structure.	atlsecurity.h
CDebugReportHook Class	Use this class to send debug reports to a named pipe.	atlutil.h
CDefaultCharTraits	This class provides two static functions for converting characters between uppercase and lowercase.	atlcoll.h
CDefaultCompareTraits	This class provides default element comparison functions.	atlcoll.h
CDefaultElementTraits	This class provides default methods and functions for a collection class.	atlcoll.h
CDefaultHashTraits	This class provides a static function for calculating hash values.	atlcoll.h
CDialogImpl	This class provides methods for creating a modal or modeless dialog box.	atlwin.h
CDynamicChain	This class provides methods supporting the dynamic chaining of message maps.	atlwin.h
CElementTraits	This class is used by collection classes to provide methods and functions for moving, copying, comparison, and hashing operations.	atlcoll.h
CElementTraitsBase	This class provides default copy and move methods for a collection class.	atlcoll.h
CFirePropNotifyEvent	This class provides methods for notifying the container's sink regarding control property changes.	atlctl.h
CGlobalHeap	This class implements IAtlMemMgr using the Win32 global heap functions.	atlmem.h
CHandle	This class provides methods for creating and using a handle object.	atlbase.h
CHeapPtr	A smart pointer class for managing heap pointers.	atlcore.h
CHeapPtrBase	This class forms the basis for several smart heap pointer classes.	atlcore.h
CHeapPtrElementTraits Class	This class provides methods, static functions, and typedefs useful when creating collections of heap pointers.	atlcoll.h
CHeapPtrList	This class provides methods useful when constructing a list of heap pointers.	atlcoll.h
CImage	Provides enhanced bitmap support, including the ability to load and save images in JPEG, GIF, BMP, and Portable Network Graphics (PNG) formats.	atlimage.h
CInterfaceArray	This class provides methods useful when constructing an array of COM interface pointers.	atlcoll.h
CInterfaceList	This class provides methods useful when constructing a list of COM interface pointers.	atlcoll.h
CLocalHeap	This class implements IAtlMemMgr using the Win32 local heap functions.	atlmem.h
CMessageMap	This class allows an object's message maps to be accessed by another object.	atlwin.h
CNonStatelessWorker Class	Receives requests from a thread pool and passes them on to a worker object that is created and destroyed on each request.	atlutil.h
CNoWorkerThread Class	Use this class as the argument for the MonitorClass template parameter cache classes if you want to disable dynamic cache maintenance.	atlutil.h
CPathT Class	This class represents a path.	atlpath.h
CPrimitiveElementTraits	This class provides default methods and functions for a collection class composed of primitive data types.	atlcoll.h
CPrivateObjectSecurityDesc	This class represents a private object security descriptor object.	atlsecurity.h
CRBMap	This class represents a mapping structure, using a Red-Black binary tree.	atlcoll.h
CRBMultiMap	This class represents a mapping structure that allows each key to be associated with more than one value, using a Red-Black binary tree.	atlcoll.h
CRBTree	This class provides methods for creating and utilizing a Red-Black tree.	atlcoll.h
CRegKey	This class provides methods for manipulating entries in the system registry.	atlbase.h
CRTThreadTraits	This class provides the creation function for a CRT thread. Use this class if the thread will use CRT functions.	atlbase.h
CSacl	This class is a wrapper for a SACL (system access-control list) structure.	atlsecurity.h
CSecurityAttributes	This class is a thin wrapper for the SECURITY_ATTRIBUTES structure.	atlsecurity.h
CSecurityDesc	This class is a wrapper for the SECURITY_DESCRIPTOR structure.	atlsecurity.h
CSid	This class is a wrapper for a SID (security identifier) structure.	atlsecurity.h
CSimpleArray	This class provides methods for managing a simple array.	atlsimpcoll.h
CSimpleArrayEqualHelper	This class is a helper for the CSimpleArray class.	atlsimpcoll.h
CSimpleArrayEqualHelperFalse	This class is a helper for the CSimpleArray class.	atlsimpcoll.h
CSimpleDialog	This class implements a basic modal dialog box.	atlsimpcoll.h
CSimpleMap	This class provides support for a simple mapping array.	atlsimpcoll.h
CSimpleMapEqualHelper	This class is a helper for the CSimpleMap class.	atlsimpcoll.h
CSimpleMapEqualHelperFalse	This class is a helper for the CSimpleMap class.	atlsimpcoll.h
CSnapInItemImpl	This class provides methods for implementing a snap-in node object.	atlsnap.h
CSnapInPropertyPageImpl	This class provides methods for implementing a snap-in property page object.	atlsnap.h
CStockPropImpl	This class provides methods for supporting stock property values.	atlctl.h
CStringElementTraits	This class provides static functions used by collection classes storing CString objects.	cstringt.h
CStringElementTraitsI	This class provides static functions related to strings stored in collection class objects. It is similar to CStringElementTraits, but performs case-insensitive comparisons.	atlcoll.h
CStringRefElementTraits	This class provides static functions related to strings stored in collection class objects. The string objects are dealt with as references.	atlcoll.h
CThreadPool Class	This class provides a pool of worker threads that process a queue of work items.	atlutil.h
CTokenGroups	This class is a wrapper for the TOKEN_GROUPS structure.	atlsecurity.h
CTokenPrivileges	This class is a wrapper for the TOKEN_PRIVILEGES structure.	atlsecurity.h
CUrl Class	This class represents a URL. It allows you to manipulate each element of the URL independently of the others whether parsing an existing URL string or building a string from scratch.	atlutil.h
CW2AEX	This class is used by the string conversion macros CT2AEX, CW2TEX, CW2CTEX, and CT2CAEX, and the typedef CW2A.	atlconv.h
CW2CWEX	This class is used by the string conversion macros CW2CTEX and CT2CWEX, and the typedef CW2CW.	atlconv.h
CW2WEX	This class is used by the string conversion macros CW2TEX and CT2WEX, and the typedef CW2W.	atlconv.h
CWin32Heap	This class implements IAtlMemMgr using the Win32 heap allocation functions.	atlmem.h
CWindow	This class provides methods for manipulating a window.	atlwin.h
CWindowImpl	This class provides methods for creating or subclassing a window.	atlwin.h
CWinTraits	This class provides a method for standardizing the styles used when creating a window object.	atlwin.h
CWinTraitsOR	This class provides a method for standardizing the styles used when creating a window object.	atlwin.h
CWndClassInfo	This class provides methods for registering information for a window class.	atlwin.h
CWorkerThread Class	This class creates a worker thread or uses an existing one, waits on one or more kernel object handles, and executes a specified client function when one of the handles is signaled.	atlutil.h
IAtlAutoThreadModule	This class represents an interface to a CreateInstance method.	atlbase.h
IAtlMemMgr	This class represents the interface to a memory manager.	atlmem.h
IAxWinAmbientDispatch	This interface provides methods for specifying characteristics of the hosted control or container.	atlbase.h, ATLIFace.h
IAxWinAmbientDispatchEx	This interface implements supplemental ambient properties for a hosted control.	atlbase.h, ATLIFace.h
IAxWinHostWindow	This interface provides methods for manipulating a control and its host object.	atlbase.h, ATLIFace.h
IAxWinHostWindowLic	This interface provides methods for manipulating a licensed control and its host object.	atlbase.h, ATLIFace.h
ICollectionOnSTLImpl	This class provides methods used by a collection class.	atlcom.h
IConnectionPointContainerImpl	This class implements a connection point container to manage a collection of IConnectionPointImpl objects.	atlcom.h
IConnectionPointImpl	This class implements a connection point.	atlcom.h
IDataObjectImpl	This class provides methods for supporting Uniform Data Transfer and managing connections.	atlctl.h
IDispatchImpl	This class provides a default implementation for the IDispatch portion of a dual interface.	atlctl.h
IDispEventImpl	This class provides implementations of the IDispatch methods.	atlcom.h
IDispEventSimpleImpl	This class provides implementations of the IDispatch methods, without getting type information from a type library.	atlcom.h
IDocHostUIHandlerDispatch	An interface to the Microsoft HTML parsing and rendering engine.	atlbase.h, ATLIFace.h
IEnumOnSTLImpl	This class defines an enumerator interface based on an STL collection.	atlcom.h
IObjectSafetyImpl	This class provides a default implementation of the IObjectSafety interface to allow a client to retrieve and set an object's safety levels.	atlctl.h
IObjectWithSiteImpl	This class provides methods allowing an object to communicate with its site.	atlcom.h
IOleControlImpl	This class provides a default implementation of the IOleControl interface and implements IUnknown.	atlctl.h
IOleInPlaceActiveObjectImpl	This class provides methods for assisting communication between an in-place control and its container.	atlctl.h
IOleInPlaceObjectWindowlessImpl	This class implements IUnknown and provides methods that enable a windowless control to receive window messages and to participate in drag-and-drop operations.	atlctl.h
IOleObjectImpl	This class implements IUnknown and is the principal interface through which a container communicates with a control.	atlctl.h
IPerPropertyBrowsingImpl	This class implements IUnknown and allows a client to access the information in an object's property pages.	atlctl.h
IPersistPropertyBagImpl	This class implements IUnknown and allows an object to save its properties to a client-supplied property bag.	atlcom.h
IPersistStorageImpl	This class implements the IPersistStorage interface.	atlcom.h
IPersistStreamInitImpl	This class implements IUnknown and provides a default implementation of the IPersistStreamInit interface.	atlcom.h
IPointerInactiveImpl	This class implements IUnknown and the IPointerInactive interface methods.	atlctl.h
IPropertyNotifySinkCP	This class exposes the IPropertyNotifySink interface as an outgoing interface on a connectable object.	atlctl.h
IPropertyPage2Impl	This class implements IUnknown and inherits the default implementation of IPropertyPageImpl.	atlctl.h
IPropertyPageImpl	This class implements IUnknown and provides a default implementation of the IPropertyPage interface.	atlctl.h
IProvideClassInfo2Impl	This class provides a default implementation of the IProvideClassInfo and IProvideClassInfo2 methods.	atlcom.h
IQuickActivateImpl	This class combines containers' control initialization into a single call.	atlctl.h
IRunnableObjectImpl	This class implements IUnknown and provides a default implementation of the IRunnableObject interface.	atlctl.h
IServiceProviderImpl	This class provides a default implementation of the IServiceProvider interface.	atlcom.h
ISpecifyPropertyPagesImpl	This class implements IUnknown and provides a default implementation of the ISpecifyPropertyPages interface.	atlcom.h
ISupportErrorInfoImpl	This class provides a default implementation of the ISupportErrorInfo Interface interface and can be used when only a single interface generates errors on an object.	atlcom.h
IThreadPoolConfig Interface	This interface provides methods for configuring a thread pool.	atlutil.h
IViewObjectExImpl	This class implements IUnknown and provides default implementations of the IViewObject, IViewObject2, and IViewObjectEx interfaces.	atlctl.h
IWorkerThreadClient Interface	IWorkerThreadClient is the interface implemented by clients of the CWorkerThread class.	atlutil.h
_U_MENUorID	This class provides wrappers for CreateWindow and CreateWindowEx.	atlwin.h
_U_RECT	This argument adapter class allows either RECT pointers or references to be passed to a function that is implemented in terms of pointers.	atlwin.h
_U_STRINGorID	This argument adapter class allows either resource names (LPCTSTRs) or resource IDs (UINTs) to be passed to a function without requiring the caller to convert the ID to a string using the MAKEINTRESOURCE macro.	atlwin.h
Win32ThreadTraits	This class provides the creation function for a Windows thread. Use this class if the thread will not use CRT functions.	atlbase.h

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