nonextensible

Article
01/03/2018

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

Specifies that the IDispatch implementation includes only the properties and methods listed in the interface description and cannot be extended with additional members at run time.

Syntax

  
[nonextensible]

Remarks

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

Use of nonextensible also requires the oleautomation attribute.

Example

The following code shows one use of the nonextensible attribute:

// cpp_attr_ref_nonextensible.cpp  
// compile with: /LD  
#include "unknwn.h"  
[module(name="ATLFIRELib")];  
[export] typedef long HRESULT;  
  
[dual, nonextensible, ms_union, oleautomation,   
uuid("00000000-0000-0000-0000-000000000001")]  
__interface IFireTabCtrl  
{  
   HRESULT procedure (int i);   
};

Requirements

Attribute Context

Applies to	`interface`
Repeatable	No
Required attributes	dual and oleautomation, or dispinterface
Invalid attributes	None

For more information about the attribute contexts, see Attribute Contexts.

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