This article needs additional citations for. Unsourced material may be challenged and removed. Find sources: – ( April 2008) () Component Object Model ( COM) is a standard for introduced by in 1993. It is used to enable creation in a large range of. COM is the basis for several other Microsoft technologies and frameworks, including,,,,,, the,,. The essence of COM is a language-neutral way of implementing objects that can be used in environments different from the one in which they were created, even across machine boundaries. For well-authored components, COM allows reuse of objects with no knowledge of their internal implementation, as it forces component implementers to provide well-defined that are separated from the implementation.

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The different allocation semantics of languages are accommodated by making objects responsible for their own creation and destruction through. Between different interfaces of an object is achieved through the QueryInterface method. The preferred method of 'inheritance' within COM is the creation of sub-objects to which method 'calls' are delegated. COM is an interface technology defined and implemented as standard only on and Apple's 1.3 and later plug-in (API).

The latter only implements a subset of the whole COM interface. Best cc ide for mac. For some applications, COM has been replaced at least to some extent by the framework, and support for through the (WCF).

However, COM objects can be used with all.NET languages through.NET. Networked DCOM uses binary, while WCF encourages the use of -based messaging. COM is very similar to other interface technologies, such as and, although each has its own strengths and weaknesses. Unlike C++, COM provides a stable (ABI) that does not change between compiler releases. This makes COM interfaces attractive for object-oriented C++ libraries that are to be used by clients compiled using different compiler versions.

Contents • • • • • • • • • • • • • • • • • • • • • • • • • • History [ ] One of the first methods of in Windows was (DDE), first introduced in 1987, that allowed sending and receiving messages in so-called 'conversations' between applications. Involved in the creation of the COM architecture, later distributed two internal papers in Microsoft that embraced the concept of software components: Object Architecture: Dealing With the Unknown – or – Type Safety in a Dynamically Extensible Class Library in 1988 and On Inheritance: What It Means and How To Use It in 1990. These provided the foundation of many of the ideas behind COM. (OLE), Microsoft's first object-based framework, was built on top of DDE and designed specifically for. Pasportnie dannie zhitelej ukraine.