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handlenulltraits-structure.md

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description Learn more about: HANDLENullTraits Structure
title HANDLENullTraits Structure
ms.date 09/27/2018
ms.topic reference
f1_keywords
corewrappers/Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits
corewrappers/Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits::Close
corewrappers/Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits::GetInvalidValue
helpviewer_keywords
Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits structure
Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits::Close method
Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits::GetInvalidValue method
ms.assetid 88a29a14-c516-40cb-a0ca-ee897a668623

HANDLENullTraits Structure

Defines common characteristics of an uninitialized handle.

Syntax

struct HANDLENullTraits;

Members

Public Typedefs

Name Description
Type A synonym for HANDLE.

Public Methods

Name Description
HANDLENullTraits::Close Closes the specified handle.
HANDLENullTraits::GetInvalidValue Represents an invalid handle.

Inheritance Hierarchy

HANDLENullTraits

Requirements

Header: corewrappers.h

Namespace: Microsoft::WRL::Wrappers::HandleTraits

HANDLENullTraits::Close

Closes the specified handle.

inline static bool Close(
   _In_ Type h
);

Parameters

h
The handle to close.

Return Value

true if handle h closed successfully; otherwise, false.

HANDLENullTraits::GetInvalidValue

Represents an invalid handle.

inline static Type GetInvalidValue();

Return Value

Always returns nullptr.