| description | Learn more about: iid_is | |
|---|---|---|
| title | iid_is (C++ COM Attribute) | |
| ms.date | 10/02/2018 | |
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| ms.assetid | 2f9b42a9-7130-4b08-9b1e-0d5d360e10ff |
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 | Value |
|---|---|
| Applies to | Interface parameter, data member |
| Repeatable | No |
| Required attributes | None |
| Invalid attributes | None |
For more information, see Attribute Contexts.