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The Windows API, informally WinAPI, is the foundational application programming interface (API) that allows a computer program to access the features of the Microsoft Windows operating system in which the program is running.
Classes are defined for many of the handle-managed Windows objects and also for predefined windows and common controls. At the time of its introduction, MFC provided C++ macros for Windows message-handling (via Message Maps [ 9 ] ), exceptions , run-time type identification (RTTI), serialization and dynamic class instantiation.
Microsoft codenames are given by Microsoft to products it has in development before these products are given the names by which they appear on store shelves. Many of these products (new versions of Windows in particular) are of major significance to the IT community, and so the terms are often widely used in discussions before the official release.
windows.h is a source code header file that Microsoft provides for the development of programs that access the Windows API (WinAPI) via C language syntax. It declares the WinAPI functions, associated data types and common macros. Access to WinAPI can be enabled for a C or C++ program by including it into a source file: #include <windows.h>
Hungarian notation was designed to be language-independent, and found its first major use with the BCPL programming language. Because BCPL has no data types other than the machine word, nothing in the language itself helps a programmer remember variables' types.
wchar_t: Type used for a code unit in "wide" strings. On Windows, the only platform to use wchar_t extensively, it's defined as 16-bit [8] which was enough to represent any Unicode character, but is now only enough to represent a UTF-16 code unit, which can be half a code point. On other platforms it is defined as 32-bit and a Unicode code ...
That is, WinRT is an "API delivery system". Apps using the Windows Runtime may run inside a sandboxed environment to allow greater security and stability and can natively support both x86 and ARM. [2] [3] WinRT components are designed with interoperability among multiple languages and APIs in mind, including native, managed and scripting ...
The name HRESULT appears to mean "result handle" since many other Windows types use H to mean handle. For example, HMODULE is a module handle which means an HMODULE value refers to a module resource. However, an HRESULT value does not refer to a resource so it is not a handle.