IID_PPV_ARGS_Helper Function

Visual Studio 2015

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at IID_PPV_ARGS_Helper Function.

Verifies that the type of the specified argument derives from the IUnknown interface.

Important
This template specialization supports the WRL infrastructure and is not intended to be used directly from your code. Use IID_PPV_ARGS instead.

Syntax

template<  
   typename T  
>  
void** IID_PPV_ARGS_Helper(  
   _Inout_ Microsoft::WRL::Details::ComPtrRef<T> pp  
);

T
The type of argument pp.

pp
A doubly-indirect pointer.

Argument pp cast to a pointer-to-a-pointer to void.

A compile-time error is generated if the template parameter T doesn't derive from IUnknown.

Header: client.h