Visual Component Library definition programmingVCL
A application framework library for Microsoft Windows
and Borland Software Corp.'s Delphi
and C++Builder rapid application development
software. VCL was originally designed for Delphi but is now also used for C++Builder. This replaces OWL
Object Windows Library as Borland's Windows C++ framework of choice. VCL encapsulates the C-based Win32 API into a much easier to use, object-oriented
form. Like its direct rival, Microsoft Foundation Class Library (MFC), VCL includes classes to create Windows programs.
The VCL component class can be inherited to create new VCL components, which are the building blocks of Delphi and C++Builder applications. VCL components are somewhat in competition with ActiveX
controls, though a VCL wrapper can be created to make an ActiveX control seem like a VCL component.