dual
Places an interface in the .idl file as a dual interface.
[dual]
Remarks
When the dual C++ attribute precedes an interface, it causes the interface to be placed inside the library block in the generated .idl file.
Example
The following code is an attribute block that uses dual before an interface definition:
// cpp_attr_ref_dual.cpp
// compile with: /LD
#include <windows.h>
[module(name="MyLibrary")];
[uuid("2F5F63F1-16DA-11d2-9E7B-00C04FB926DA"), dual]
__interface IStatic : IDispatch
{
HRESULT Func1(int i);
[ propget,
id(1),
bindable,
displaybind,
defaultbind,
requestedit
]
HRESULT P1([out, retval] long *nSize);
[ propput,
id(1),
bindable,
displaybind,
defaultbind,
requestedit
]
HRESULT P1([in] long nSize);
};
[cpp_quote("#include file.h")];
Requirements
Attribute Context
Applies to |
interface |
Repeatable |
No |
Required attributes |
None |
Invalid attributes |
dispinterface |
For more information, see Attribute Contexts.