User:Pdefilippis/VCL

VCL

VCL is the Visual Class Library module of OpenOffice.org. It's goal is to link the graphical interface and the underlying management of the program together. VCL therefore handles all of the user interaction mechanisms with OOo such as the mouse and the keyboard.

The System abstraction layer implements a basic abstraction of the underlying system. For your components to be system independent you should use SAL. SAL includes abstractions for thread creation and synchronization. Mechanisms for process communication and file system access are also part of this library. Management of libraries and profiles is also included. Functions for creating and manipulating strings and wide strings belong to SAL. The functionality of SAL is split in two namespaces osl (system functions) and rtl (strings and memory management) . SAL only exports functions conforming to the C calling convention. So, it should be suitable to be a system abstraction for any language.