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iid_is

  • Article

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 Value
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