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This allows for server-side processing or an add-in module. Alternatively, a Visual Basic component can have no user interface, and instead provide ActiveX objects to other programs via Component Object Model (COM).
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When the user selects an element, an event handler is called that executes code that the programmer created to perform the action for that list item. For example, a drop-down combination box automatically displays a list. Controls provide the basic functionality of the application, while programmers can insert additional logic within the appropriate event handlers. Dialog boxes with less functionality can be used to provide pop-up capabilities.
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Visual Basic can create executables (EXE files), ActiveX controls, or DLL files, but is primarily used to develop Windows applications and to interface with database systems. By inserting code into the event handler for a keypress in a text box, the program can automatically translate the case of the text being entered, or even prevent certain characters from being inserted. For example, code can be inserted into the form resize event handler to reposition a control so that it remains centered on the form, expands to fill up the form, etc. Many attribute values can be modified during run time based on user actions or changes in the environment, providing a dynamic application. Default values are provided when the control is created, but may be changed by the programmer. Controls have attributes and event handlers associated with them. A tool is used to place controls (e.g., text boxes, buttons, etc.) on the form (window). Earlier versions of Windows (95/98/NT), require that the runtime libraries be distributed with the executable.įorms are created using drag-and-drop techniques.
Core runtime libraries are included by default in Windows 2000 and later, but extended runtime components still have to be installed. Though VB programs can be compiled into native code executables from version 5 on, they still require the presence of around 1 MB of runtime libraries. Programs built with earlier versions suffered performance problems, but faster computers and native code compilation has made this less of an issue. Since VB defines default attributes and actions for the components, a programmer can develop a simple program without writing much code. Programming in VB is a combination of visually arranging components or controls on a form, specifying attributes and actions for those components, and writing additional lines of code for more functionality. Programmers can create both simple and complex GUI applications. Like the BASIC programming language, Visual Basic was designed to have an easy learning curve. Ī dialect of Visual Basic, Visual Basic for Applications (VBA), is used as a macro or scripting language within several Microsoft and ISV applications, including Microsoft Office. Visual Basic 6.0 was selected as the most dreaded programming language by respondents of Stack Overflow's annual developer survey in 2016, 2017, and 2018.
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In 2014, some software developers still preferred Visual Basic 6.0 over its successor, Visual Basic. The Microsoft Visual Basic team still maintains compatibility for Visual Basic 6.0 applications through its "It Just Works" program on supported Windows operating systems. On April 8, 2008, Microsoft stopped supporting Visual Basic 6.0 IDE. Programs written in Visual Basic can also make use of the Windows API, which requires external functions declarations. Over time the community of programmers developed third-party components. Visual Basic was derived from BASIC and enables the rapid application development (RAD) of graphical user interface (GUI) applications, access to databases using Data Access Objects, Remote Data Objects, or ActiveX Data Objects, and creation of ActiveX controls and objects.Ī programmer can create an application using the components provided by the Visual Basic program itself. Microsoft intended Visual Basic to be relatively easy to learn and use. The original Visual Basic (also referred to as Classic Visual Basic) is a third-generation event-driven programming language from Microsoft known for its Component Object Model (COM) programming model first released in 1991 and declared legacy during 2008. NET, Windows Forms, Gambas, Xojo, Basic4ppc, Basic4android and NS Basic
com /en-us /library /windows /desktop /ms788229.
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