iid_is

Article
01/03/2018

The latest version of this topic can be found at iid_is.

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

Syntax

  
      [ iid_is(  
   "expression"  
) ]

Parameters

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

Remarks

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

Example

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")];

Requirements

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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