Microsoft Windows library files

The Microsoft Windows operating system and Microsoft Windows SDK support a collection of shared libraries that software can use to access the Windows API. This article provides an overview of the core libraries included with modern Windows installation, upon which most Windows applications are built. == Library sources == The Windows operating system contains compiled versions of these libraries known as dynamically-linked libraries (.dll), which are executable libraries that can be used by multiple programs while only one copy of the library is loaded into memory.

Source: Wikipedia — Microsoft Windows library files (CC BY-SA 4.0)