It was envisioned that existing applications using VCL would be recompiled with CLX.

FireMonkey and VCL are not compatible ; one or the other must be used, and older VCL applications cannot use Firemonkey unless user interfaces are recreated with FireMonkey forms and controls.

Third parties have published information on how to use Firemonkey forms in VCL software, to facilitate gradual migration, but even then VCL and Firemonkey controls cannot be used on the same form.

With class helpers new functionality can be introduced to core RTL and VCL classes without changing the original source code of the RTL or VCL.

. NET is modeled after VCL, since one of the main architects of the first Delphi versions, Anders Hejlsberg, went to Microsoft and was one of the main architects of NET there.

* Torry's Delphi Pages The main repository for free and commercial VCL components

Notable shared Delphi ( Pascal code ) and C ++ Builder routines include the FastMM4 memory manager, which was developed as a community effort within the FastCode project, the entire UI framework known as the VCL, which is written in Pascal, as well as base system routines, many of which have been optimised for both Delphi and C ++ Builder through the FastCode project.

The Visual Component Library ( abbreviated VCL ) is a visual component-based object-oriented framework for developing Microsoft Windows applications.

* LCL, an open source framework very similar ( but not a clone, even less a port ) to VCL, developed for Lazarus RAD tool.

Borland later released VCL ( Visual Component Library ) to replace the OWL framework.

Kylix used the new CLX cross-platform framework, instead of Delphi's VCL.

The Delphi products all ship with a large framework called the Visual Component Library, usually referred to by its initials VCL, including most of its source code.

The VCL framework maintains a high level of source compatibility between versions which simplifies adapting existing source code to a newer Delphi version.

After that Borland concentrated development in the VCL framework which has been evolving alongside OWL since Delphi 1. 0 launched two years before.

VCL ( Voluntary Collective Licensing ) is the framework by which most Reproduction Rights Organisations ( RROs ) in the English speaking world operate.

The standard application framework, Lazarus Component Library ( LCL ) was modeled after the Visual Component Library ( VCL ) in Delphi 6, but is available for operating systems other than Windows.

Borland later deprecated it in favour of the Visual Component Library ( VCL ), which is written in Object Pascal and available in both Delphi and C ++ Builder.

Examples on how linkage OWL apps with VCL Forms ( Dialogs ) were included in the last version of Borland C ++.

When Borland deprecated OWL in favor of VCL, a group of developers led by Yura Bidus started the project of maintaining the library in 1998.

CLX is not 100 % compatible with VCL, and most Delphi programs require some effort to port to Kylix, even if they stick to the Borland libraries and avoid any direct OS calls.

In 2007 CodeGear released C ++ Builder 2007, providing full API support for Microsoft Vista, increased ANSI C ++ conformance, up to 500 % faster in-IDE build performance, support for MSBuild, DBX4 database architecture, and " VCL for the Web " which supports AJAX.

The API support for Microsoft Vista includes themed applications and seamless VCL support for Aero and Vista Desktop.

A cross-platform equivalent of the VCL, called CLX ( Component Library for Cross Platform ), was later developed for use in Delphi, C ++ Builder and Kylix.

VCL provides native support for PME ( Properties, Methods and Events ) model at. NET level.

Attempts to support both Linux and Windows for cross-platform development were made, and a cross-platform alternative to the VCL known as CLX shipped in 2001 with the release of Delphi 6.

Delphi 2009 ( Delphi 12, code named Tiburón ), added many new features such as completely reworking the VCL and RTL for full Unicode support, and added generics and anonymous methods for Win32 native development.

They include the VCL ( Visual Component Library ), support for COM independent interfaces with reference counted class implementations, and support for a large number of third-party components.

VCL components cover Windows controls like windows ( TForm class ), controls ( e. g., TButton, TCheckBox, TLabel classes ) as well as database access ( e. g., ADO or IBX components ) or Internet connections ( Indy components ).

However, due to lacklustre performance on Windows, subtle differences from VCL, and bugs, it didn't become the expected successor to VCL.

Delphi XE2 is supplied with both the VCL, and an alternative library called FireMonkey that supports Windows, Apple Mac OS X and the Apple iPhone, iPod Touch and iPad portable devices.

The design of the standard class libraries ( VCL / RTL ) had become somewhat dated and restrictive ; Embarcadero released in 2011 as part of Delphi XE2 a new compiler and cross-platform VCL replacement called FireMonkey, based on Direct3D and OpenGL, which runs on other platforms in addition to Windows, supporting their features, but is not backwards-compatible with VCL applications.

As such, VCL is tightly bound to Windows, and Kylix's CLX is built on top of Trolltech's Qt library.

In September 1978, the same month he left Dalek I Love You, McCluskey rejoined Humphreys and their VCL XI project was renamed Orchestral Manoeuvres in the Dark.

C ++ Builder 2009 was released in August 2008, with the most notable improvements being full Unicode support throughout VCL and RTL, early adoption of the C ++ 0x standard, full ITE ( Integrated Translation Environment ) support, native Ribbon components and the inclusion of the Boost library.

C ++ Builder 2010 then followed in August 2009, adding in particular the touch and gesture support newly introduced to the VCL and a C ++ specific class explorer.

The component approach allows programmers to extend the VCL with many visual and non-visual additional components.

While not all VCL components are thread-safe, VCL supports multi-threading too.

One example is the built in multi-threading support of the OpenWire VCL library.

OpenOffice. org contains an unrelated graphic library also called VCL.

* OpenWire open source library adding Dataflow programming functionality to VCL.

The API of CLX almost completely followed VCL.