Dynamic link library

A dynamic link library (DLL) is a type of file that contains a set of instructions that can be executed by other programs. These instructions can include functions, data, and other resources that can be shared among multiple programs, which allows them to be more modular and efficient. DLLs are commonly used in the Windows operating system and other platforms to provide reusable code that can be accessed by multiple programs. They are often used to implement common functionality, such as graphics and user interface elements, so that developers do not have to write this code from scratch for each program.