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Places a construct inside the IDL library block.


Attribute Context

Applies to Anywhere
Repeatable No
Required attributes None
Invalid attributes None

For more information, see Attribute Contexts.


When you place a construct inside the library block, you ensure that it will be passed into the type library, regardless of whether it is referenced. By default, only constructs modified by the coclass, dispinterface, and idl_module attributes are placed in the library block.


In the following code, a custom interface is placed inside the library block.

// cpp_attr_ref_library_block.cpp
// compile with: /LD
#include <windows.h>
[object, library_block, uuid("9E66A290-4365-11D2-A997-00C04FA37DDB")]
__interface IMyInterface
   HRESULT f1();

See Also

Compiler Attributes | Stand-Alone Attributes | Attributes Samples