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- IDispatch abstract "IDispatch is the interface that exposes the OLE Automation protocol. It is one of the standard interfaces that can be exposed by COM objects. COM distinguishes between three interface types: custom that are VTABLE-based IUnknown interfaces, dispatch that are IDispatch interfaces supporting introspection, and dual interfaces supporting both types.The Automation (IDispatch) interface allows a client application to find out what properties and methods are supported by an object at run-time, i.e. implements the concept of RTTI. It also provides the information necessary to invoke these properties and methods. Client applications do not need to be aware of the object members when they are compiled. This allows COM and ActiveX objects to be called by scripting programs platforms such as the ASP server and JavaScript on Internet Explorer, where calling conventions were not known at the time IIS or IE were built. By contrast, a simple object library is compiled and linked into a program, e.g. a DLL call needs to know a function name and parameters at compile time.A script writer can ask the COM object for a method or property it already knows about from documentation. Then, the client can execute the function with Invoke provided by the IDispatch interface, a form of late-binding. This sort of capability was also supported by Dynamic Data Exchange (DDE), which never became popular due to being too low-level.Dispatch interfaces are flexible, but suffer from additional introspection and invocation overhead compared to custom interfaces. It is therefore often a good idea to support both interface types with dual interfaces. That way, clients supporting VTABLE-based invocation can use the custom interface instead of the dispatch counterpart.".
- IDispatch wikiPageExternalLink idispatchcodegenerator.
- IDispatch wikiPageExternalLink disphelper.sourceforge.net.
- IDispatch wikiPageID "1918549".
- IDispatch wikiPageLength "4424".
- IDispatch wikiPageOutDegree "18".
- IDispatch wikiPageRevisionID "655520692".
- IDispatch wikiPageWikiLink Active_Server_Pages.
- IDispatch wikiPageWikiLink Category:Microsoft_application_programming_interfaces.
- IDispatch wikiPageWikiLink Category:Object-oriented_programming.
- IDispatch wikiPageWikiLink Component_Object_Model.
- IDispatch wikiPageWikiLink Dynamic_Data_Exchange.
- IDispatch wikiPageWikiLink Globally_unique_identifier.
- IDispatch wikiPageWikiLink IUnknown.
- IDispatch wikiPageWikiLink Interface_(computing).
- IDispatch wikiPageWikiLink Internet_Explorer.
- IDispatch wikiPageWikiLink Internet_Information_Services.
- IDispatch wikiPageWikiLink JavaScript.
- IDispatch wikiPageWikiLink Late_binding.
- IDispatch wikiPageWikiLink OLE_Automation.
- IDispatch wikiPageWikiLink Open_source.
- IDispatch wikiPageWikiLink Run-time_type_information.
- IDispatch wikiPageWikiLink String_(computer_science).
- IDispatch wikiPageWikiLink Variant_type.
- IDispatch wikiPageWikiLinkText "IDispatch".
- IDispatch wikiPageUsesTemplate Template:More_footnotes.
- IDispatch wikiPageUsesTemplate Template:Reflist.
- IDispatch subject Category:Microsoft_application_programming_interfaces.
- IDispatch subject Category:Object-oriented_programming.
- IDispatch hypernym Interface.
- IDispatch type Software.
- IDispatch type Redirect.
- IDispatch comment "IDispatch is the interface that exposes the OLE Automation protocol. It is one of the standard interfaces that can be exposed by COM objects. COM distinguishes between three interface types: custom that are VTABLE-based IUnknown interfaces, dispatch that are IDispatch interfaces supporting introspection, and dual interfaces supporting both types.The Automation (IDispatch) interface allows a client application to find out what properties and methods are supported by an object at run-time, i.e.".
- IDispatch label "IDispatch".
- IDispatch sameAs Q5970136.
- IDispatch sameAs m.0660x1.
- IDispatch sameAs Q5970136.
- IDispatch wasDerivedFrom IDispatch?oldid=655520692.
- IDispatch isPrimaryTopicOf IDispatch.