Out - The parameter that specifies data that is passed back to the caller.In – Specifies the parameter to be passed from the calling procedure to the called procedure.Helpstring - The character string which describes this method.HRESULT LogMemberClaims( IMember* Member) Interface body exampleĬopy Code interface ILogManager : IDispatch Pointer_default: Specifies the default pointer attribute for all pointers except the top-level pointers that appear in the parameter lists.įor more information: MSDN.Helpstring: A character string that is used to describe the element to which it applies.Nonextensible: This specifies that the IDispatch implementation includes only the properties and methods listed in the interface description, and that it cannot be extended with additional members at runtime.Dual: The dual attribute identifies an interface that exposes properties and methods through IDispatch and VTBL.Each interface, class, and type library must be identified with its own unique identifier. Uuid: Represents a universally unique identifier (UUID) that is assigned to the interface and that distinguishes it from other interfaces.Object: This indicates that it is a COM interface.
These attributes are enclosed in square brackets at the beginning of the interface definition. Attributes in the interface header are global to the entire interface.
Uuid(C0E20128-DB19-4DB3-BCA1-24595E5E24A8),Īn iInterface header contains attributes that are platform-independent. In other words, everything which needs to be exposed from the interface will be there in the IDL file.) Structure of an IDL file
(Each interface body may contain methods, properties, variables/constants, enums etc.
The interface body can also contain imports, pragmas, constant declarations, and type declarations. The IDL interface body contains data types used in remote procedure calls and the function prototypes for the remote procedures. The IDL interface header specifies information about the interface as a whole. Each interface definition is composed of an interface header and an interface body. In any IDL file, there can be one or more interface definitions defined as part of a module. IDL files are similar to C++ header files. The Interface Definition Language (IDL) is not a programming language, but a descriptive language to describe the interfaces being implemented by objects. A file that contains interface and type library definitions is called an IDL file, and has a. MIDL (Microsoft Interface Definition Language) is used for describing COM objects.
0 kommentar(er)
