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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

iid_is

Specifies the IID of the COM interface pointed to by an interface pointer.

[ iid_is( 
   "expression" 
) ]

expression

A C language expression that specifies an IID of a COM interface pointed to by an interface pointer.

The iid_is C++ attribute has the same functionality as the iid_is MIDL attribute.

The following code shows the use of iid_is:

// cpp_attr_ref_iid_is.cpp
// compile with: /LD
#include "wtypes.h"
#include "unknwn.h"
[dispinterface, uuid("00000000-0000-0000-0000-000000000001")]
__interface IFireTabCtrl : IDispatch
{
   [id(1)] HRESULT CreateInstance([in] REFIID riid,[out, iid_is("riid")] 
   IUnknown ** ppvObject);
};

[module(name="ATLFIRELib")];

Attribute Context

Applies to

Interface parameter, data member

Repeatable

No

Required attributes

None

Invalid attributes

None

For more information, see Attribute Contexts.

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