title	ActivateInstance Function | Microsoft Docs
ms.custom
ms.date	11/04/2016
ms.technology	cpp-windows
ms.topic	reference
f1_keywords	client/Windows::Foundation::ActivateInstance client/ABI::Windows::Foundation::ActivateInstance
dev_langs	C++
helpviewer_keywords	ActivateInstance function
ms.assetid	8cfd1dd9-5fda-4cc2-acf8-d40e783b3875
author	mikeblome
ms.author	mblome
ms.workload	cplusplus uwp

ActivateInstance Function

Registers and retrieves an instance of a specified type defined in a specified class ID.

Syntax

template<typename T>  
inline HRESULT ActivateInstance(  
   _In_ HSTRING activatableClassId,  
   _Out_ Microsoft::WRL::Details::ComPtrRef<T> instance  
);  

Parameters

T
A type to activate.

activatableClassId
The name of the class ID that defines parameter T.

instance
When this operation completes, a reference to an instance of T.

Return Value

S_OK if successful; otherwise, an error HRESULT that indicates the cause of the error.

Requirements

Header: client.h

Namespace: Windows::Foundation

See Also

Windows::Foundation Namespace