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iid_is

  • Articolo

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

[ 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

Other Resources

IDL Attributes

Parameter Attributes

Attributes Samples