Visual BASIC
<language>
(VB) A popular event-driven visual programming system from Microsoft Corporation for Microsoft Windows. VB is good for developing Windows interfaces, it invokes fragments of BASIC code when the user performs certain operations on graphical objects on-screen. It is widely used for in-house application program development and for prototyping. It can also be used to create ActiveX and COM components.
Version 1 was released in 1991 [by Microsoft?]. http://msdn.microsoft.com/vbasic/. History. Strollo Software. Books.Last updated: 1999-11-26
Visual Basic for Applications
(VBA) Microsoft's common language for manipulating components of its Microsoft Office suite. It is used as the macro language for these applications and is the primary means of customising and extending them. A VBA program operates on objects representing the application and the entities it manipulates, e.g. a spreadsheet or a range of cells in Microsoft Excel.
[Relationship to Visual BASIC? URL?]Last updated: 1999-09-12
Visual BASIC Script
<language>
(VBScript) Microsoft's scripting language which is an extension of their Visual Basic language. VBScript can be used with Microsoft Office applications and others. It can also be embedded in web pages but can only be understood by Internet Explorer.
Visual Basic is a BASIC variant with object-oriented features. Objects include applications, windows and selections. [Relationship with ASP? VBA?]Last updated: 1998-07-05
visual bell
visible bellVisual C++
A C and C++ programming environment sold by Microsoft Corporation. Usenet newsgroup: comp.lang.c++. [Differences? Features?]Last updated: 1994-12-21
Visual Component Library
VCL 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. Home.Last updated: 2001-07-09
Visual dBASE
<language>
A Rapid Application Development suite with a compiler and intranet tools to enable developers to publish data on the web. Originally a Borland product, the first version released by dBase, Inc. was Visual dBase 5.7.
Last updated: 2003-11-24
Visual Display Unit
<hardware>
(VDU, or "video terminal", "video display terminal", VDT, "display terminal") A device incorporating a cathode ray tube (CRT) display, a keyboard and a serial port. A VDU usually also includes its own display electronics which store the received data and convert it into electrical waveforms to drive the CRT.
VDUs fall into two categories: dumb terminals and intelligent terminals (sometimes called "programmable terminals"). Early VDUs could only display characters in a single preset font, and these were confined to being layed out in a rectangular grid, reproducing the functionality of the paper-based teletypes they were designed to replace. Later models added graphics facilities but were still driven via serial communications, typically with several VDUs attached to a single multi-user computer. This contrasts with the much faster single bitmap displays integrated into most modern single-user personal computers and workstations. The term "Display Screen Equipment" (DSE) is used almost exclusively in connection with the health and safety issues concerning VDUs. Working with VDUs - UK Heath and Safety Executive.Last updated: 2002-11-09
Visual FoxPro
<database>
A Microsoft database derived from Fox Software's FoxPRO.
http://msdn.microsoft.com/vfoxpro/. [Features? Dates?]Last updated: 2000-08-06
Visual Interface
(vi) /V-I/, /vi:/, *never* /siks/ A screen editor crufted together by Bill Joy for an early BSD release. vi became the de facto standard Unix editor and a nearly undisputed hacker favourite outside of MIT until the rise of Emacs after about 1984.
It tends to frustrate new users no end, as it will neither take commands while expecting input text nor vice versa, and the default setup provides no indication of which mode the editor is in (one correspondent accordingly reports that he has often heard the editor's name pronounced /vi:l/). Nevertheless it is still widely used (about half the respondents in a 1991 Usenet poll preferred it), and even some Emacs fans resort to it as a mail editor and for small editing jobs (mainly because it starts up faster than the bulkier versions of Emacs). See holy wars.Last updated: 1995-10-03
visualisation
<graphics>
Making a visible presentation of numerical data, particularly a graphical one. This might include anything from a simple X-Y graph of one dependent variable against one independent variable to a virtual reality which allows you to fly around the data.
Gnuplot is the Free Software Foundation's utility for producing various kinds of graphs. Usenet newsgroup: comp.graphics. The Computer Graphics Resource Listing contains pointers to several visualisation tools. comp.graphics FAQ. Electronic Visualization Laboratory, University of Illinois at Chicago.Last updated: 2002-02-21
visual language
visual programming languagevisual programming
1. Writing programs in a language which manipulates visual information or supports visual interaction. 2. Writing programs in a visual programming language. 3. Writing programs in a visual programming environment.visual programming environment
Software which allows the use of visual expressions (such as graphics, drawings, animation or icons) in the process of programming. These visual expressions may be used as graphical interfaces for textual programming languages. They may be used to form the syntax of new visual programming languages leading to new paradigms such as programming by demonstration or they may be used in graphical presentations of the behaviour or structure of a program.Last updated: 1995-02-23
visual programming language
<language>
(VPL) Any programming language that allows the user to specify a program in a two-(or more)-dimensionsional way. Conventional textual languages are not considered two-dimensional since the compiler or interpreter processes them as one-dimensional streams of characters. A VPL allows programming with visual expressions - spatial arrangements of textual and graphical symbols.
VPLs may be further classified, according to the type and extent of visual expression used, into icon-based languages, form-based languages and diagram languages. Visual programming environments provide graphical or iconic elements which can be manipulated by the user in an interactive way according to some specific spatial grammar for program construction. A visually transformed language is a non-visual language with a superimposed visual representation. Naturally visual languages have an inherent visual expression for which there is no obvious textual equivalent. Visual Basic, Visual C++ and the entire Microsoft Visual family are not, despite their names, visual programming languages. They are textual languages which use a graphical GUI builder to make programming interfaces easier. The user interface portion of the programming environment is visual, the languages are not. Because of the confusion caused by the multiple meanings of the term "visual programming", Fred Lakin has proposed the term "executable graphics" as an alternative to VPL. Some examples of visual programming languages are Prograph, Pict, Tinkertoy, Fabrik, CODE 2.0 and Hyperpascal. http://cogs.susx.ac.uk/users/ianr/vpl.html. http://cuiwww.unige.ch/eao/www/readme.html. Usenet newsgroup: comp.lang.visual (NOT for Visual Basic or Visual C++).Last updated: 1995-02-10
VisualWorks
<language>
A modern commercial implementation of the Smalltalk programming language. VisualWorks descends directly from the original Smalltalk-80 by Xerox PARC and was originally developed (for some time under the name Objectworks\Smalltalk) by ParcPlace Systems. VisualWorks relies on dynamic translation as its virtual machine technology.
VisualWorks Wiki.Last updated: 2003-05-15
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