mixin-structure.md

description	title	ms.date	ms.topic	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: MixIn Structure	MixIn Structure	10/03/2018	reference	implements/Microsoft::WRL::MixIn	MixIn structure	47e2df9b-3a2e-4ae8-8ba3-b1fd3aa73566

MixIn Structure

Ensures that a runtime class derives from Windows Runtime interfaces, if any, and then classic COM interfaces.

Syntax

template<
    typename Derived,
    typename MixInType,
    bool hasImplements = __is_base_of(Details::ImplementsBase, MixInType)
>
struct MixIn;

Parameters

Derived
A type derived from the Implements structure.

MixInType
A base type.

hasImplements
true if MixInType is derived from the current implementation the base type; false otherwise.

Remarks

If a class is derived from both Windows Runtime and class COM interfaces, the class declaration list must first list any Windows Runtime interfaces and then any classic COM interfaces. MixIn ensures that the interfaces are specified in the correct order.

Inheritance Hierarchy

MixIn

Requirements

Header: implements.h

Namespace: Microsoft::WRL

See also

Microsoft::WRL Namespace