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async_uuid

Specifies the UUID that directs the MIDL compiler to define both synchronous and asynchronous versions of a COM interface.

[async_uuid (
   uuid
)]

uuid

A UUID that identifies the version of the interface.

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

// cpp_attr_ref_async_uuid.cpp
// compile with: /LD
#include <Windows.h>
[module(name="Test")];
[object, uuid("9e66a290-4365-11d2-a997-00c04fa37ddb"), 
async_uuid("e8583106-38fd-487e-912e-4fc8645c677e")]
__interface ICustom {
   HRESULT Custom([in] long l, [out, retval] long *pLong);
};

Attribute Context

Applies to

interface

Repeatable

No

Required attributes

None

Invalid attributes

dual, dispinterface

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

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