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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.
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 ...
New features were OLE automation, drag-and-drop, in-place activation and structured storage. Monikers evolved from OLE 1 object names, and provided a hierarchical object and resource naming system similar to URLs or URIs, which were independently invented. Windows now has merged the two technologies supporting a URL Moniker type, and a Moniker ...
They are based on Object Linking and Embedding (OLE) for process control. An industrial automation task force developed the original standard in 1996 under the name OLE for Process Control . OPC specifies the communication of real-time plant data between control devices from different manufacturers.
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 ...
OLE Automation is an inter-process communication mechanism developed by Microsoft that is based on a subset of the Component Object Model (COM). This mechanism enables, among other things, the invocation of program functions, the querying and setting of attributes and the interception of component events.
Unlike Win32 applications, native applications instantiate within the Kernel runtime code (ntoskrnl.exe) and so they must have a different entry point (NtProcessStartup, rather than (w)(Win)MainCRTStartup as is found in a Win32 application), [4] obtain their command-line arguments via a pointer to an in-memory structure, manage their own memory ...
At the same time, Microsoft stated that OLE 2 would be known simply as "OLE". In early 1996, Microsoft found a new use for OCX – extending their web browser's capability. Microsoft renamed some parts of OLE relating to the Internet as ActiveX , and gradually renamed all OLE technologies to ActiveX, except the compound document technology that ...