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In Microsoft Windows applications programming, OLE Automation (later renamed to simply Automation [1] [2]) is an inter-process communication mechanism created by Microsoft.It is based on a subset of Component Object Model (COM) that was intended for use by scripting languages – originally Visual Basic – but now is used by several languages on Windows.
IDispatch is the interface that exposes the OLE Automation protocol. [1] Extending IUnknown , 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 ...
IOleObject - This is the base interface for Object Linking and Embedding (OLE) objects. IDispatch - This interface provides name-based dynamic method dispatch for OLE Automation COM objects; IObjectWithSite - This COM interface allows a parent/child pair of objects to connect to each other to implement a Browser Helper Object (BHO)
In 1992, with Windows 3.1, Microsoft released OLE 2 with its new underlying object model, COM. The COM application binary interface (ABI) was the same as the MAPI ABI (released in 1992), and like it was based on MSRPC and ultimately on the Open Group 's DCE/RPC .
Object linking and embedding (OLE) OLE Automation; Uniscribe (see Template:Microsoft APIs section: Software Factories) Windows Image Acquisition (WIA) Windows Management Instrumentation (WMI) Winsock; Win32 console; Windows API (current versions: Win32; Win64)
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The COM support in Microsoft Visual C++ allows developers to create a variety of COM objects, OLE Automation servers, and ActiveX controls. [1] [2] ATL includes an object wizard that sets up primary structure of the objects quickly with a minimum of hand coding. On the COM client side ATL provides smart pointers that deal with COM reference ...