title	Microsoft::WRL Namespace | Microsoft Docs
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Microsoft::WRL Namespace

Defines the fundamental types that make up the Windows Runtime C++ Template Library.

Syntax

namespace Microsoft::WRL;  

Members

Typedefs

Name	Description
InhibitWeakReferencePolicy	RuntimeClassFlags<WinRt &#124; InhibitWeakReference>

Classes

Name	Description
ActivationFactory Class	Enables one or more classes to be activated by the Windows Runtime.
AsyncBase Class	Implements the Windows Runtime asynchronous state machine.
ClassFactory Class	Implements the basic functionality of the IClassFactory interface.
ComPtr Class	Creates a smart pointer type that represents the interface specified by the template parameter. ComPtr automatically maintains a reference count for the underlying interface pointer and releases the interface when the reference count goes to zero.
DeferrableEventArgs Class	A template class used for the event argument types for deferrals.
EventSource Class	Represents an event. EventSource member functions add, remove, and invoke event handlers.
FtmBase Class	Represents a free-threaded marshaler object.
Module Class	Represents a collection of related objects.
RuntimeClass Class	Represents an instantiated class that inherits the specified number of interfaces, and provides the specified Windows Runtime, classic COM, and weak reference support.
SimpleActivationFactory Class	Provides a fundamental mechanism to create a Windows Runtime or classic COM base class.
SimpleClassFactory Class	Provides a fundamental mechanism to create a base class.
WeakRef Class	Represents a weak reference that can be used by only the Windows Runtime, not classic COM. A weak reference represents an object that might or might not be accessible.

Structures

Name	Description
ChainInterfaces Structure	Specifies verification and initialization functions that can be applied to a set of interface IDs.
CloakedIid Structure	Indicates to the RuntimeClass, Implements and ChainInterfaces templates that the specified interface is not accessible in the IID list.
Implements Structure	Implements QueryInterface and GetIid for the specified interfaces.
MixIn Structure	Ensures that a runtime class derives from Windows Runtime interfaces, if any, and then classic COM interfaces.
RuntimeClassFlags Structure	Contains the type for an instance of a RuntimeClass.

Enumerations

Name	Description
AsyncResultType Enumeration	Specifies the type of result returned by the GetResults() method.
ModuleType Enumeration	Specifies whether a module should support an in-process server or an out-of-process server.
RuntimeClassType Enumeration	Specifies the type of RuntimeClass instance that is supported.

Functions

Name	Description
AsWeak Function	Retrieves a weak reference to a specified instance.
Callback Function	Creates an object whose member function is a callback method.
CreateActivationFactory Function	Creates a factory that produces instances of the specified class that can be activated by the Windows Runtime.
CreateClassFactory Function	Creates a factory that produces instances of the specified class.
Make Function	Initializes the specified Windows Runtime class.

Requirements

Header: async.h, client.h, corewrappers.h, event.h, ftm.h, implements.h, internal.h, module.h

Namespace: Microsoft::WRL

See Also

Microsoft::WRL::Wrappers Namespace