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iid_is

 

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.

See Also

IDL Attributes
Parameter Attributes
Attributes Samples