Visual Basic (.NET): Difference between revisions

Revision as of 09:10, 9 February 2025

Revision as of 23:05, 9 February 2025

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| name = Visual Basic

| logo = VB.NET Logo.svg

| logo size = 145px

| year = {{Start date and age|2001}}

| designer = [[Microsoft]]

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The Windows Forms library is most commonly used to create GUI interfaces in Visual Basic. All visual elements in the Windows Forms class library derive from the Control class. This provides the minimal functionality of a user interface element such as ___location, size, color, font, text, as well as common events like click and drag/drop. The Control class also has docking support to let a control rearrange its position under its parent.

Forms are typically designed in the [[Visual Studio]] [[Integrated development environment|IDE]]. In Visual Studio, forms are created using [[drag-and-drop]] techniques. A tool is used to place controls (e.g., text boxes, buttons, etc.) on the form (window). Controls have [[Attribute (computing)|attributes]] and [[Eventevent handler|event handlers]]s associated with them. Default values are provided when the control is created, but may be changed by the programmer. Many attribute values can be modified during run time based on user actions or changes in the environment, providing a dynamic application. 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. 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.

== Syntax ==

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{{Update section|date=June 2022|reason=give update about Visual Studio 2022 release}}

Succeeding [[Visual Basic (classic)|the classic Visual Basic]] version 6.0, the first version of Visual Basic .NET debuted in 2002. {{as of|2020|3 = }}, ten versions of Visual Basic .NET are released.

=== 2002 (VB 7.0) ===

The first version, Visual Basic .NET, relies on [[.NET Framework version history#.NET Framework 1.0|.NET Framework 1.0]]. The most important feature is [[managed code]], which contrasts with the classic Visual Basic.

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For this release, Microsoft added many features intended to reinforce Visual Basic .NET's focus as a [[rapid application development]] platform and further differentiate it from [[C Sharp (programming language)|C#]]., including:

* ''Edit and Continue'' feature{{elucidateexplain|date=February 2014}}

* Design-time expression evaluation{{ElucidateExplain|date=February 2014}}

* A pseudo-[[namespace]] called "My", which provides:<ref>{{cite web|url = http://msdn.microsoft.com/en-us/magazine/cc163680.aspx|title = Navigate The .NET Framework And Your Projects With The My Namespace|website = MSDN Magazine Visual Studio 2005 Guided Tour 2006|publisher = [[Microsoft]]|first = Duncan|last = Mackenzie|year = 2006|access-date = February 6, 2014|archive-date = February 15, 2014|archive-url = https://web.archive.org/web/20140215053141/http://msdn.microsoft.com/en-us/magazine/cc163680.aspx|url-status = live}}</ref><ref>{{cite web|url = http://msdn.microsoft.com/en-us/library/ms379610.aspx|title = My.Internals: Examining the Visual Basic My Feature|first = Tyler|last = Whitney|date = November 2005|website = [[MSDN]]|publisher = [[Microsoft]]|access-date = February 6, 2014|archive-date = June 14, 2012|archive-url = https://web.archive.org/web/20120614025325/http://msdn.microsoft.com/en-us/library/ms379610.aspx|url-status = live}}</ref>

** Easy access to certain areas of the .NET Framework that otherwise require significant code to access like using <syntaxhighlight lang="vbnet" inline>My.Form2.Text = " MainForm "</syntaxhighlight> rather than <syntaxhighlight lang="vbnet" inline>System.WindowsApplication1.Forms.Form2.text = " MainForm "</syntaxhighlight>

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=== 2012 (VB 11.0) ===

Visual Basic 2012 was released alongside [[.NET Framework 4.5]]. Major features introduced in this version include:{{ElucidateExplain|date=February 2014}}

* [[Asynchronous programming]] with "async" and "await" statements

* Iterators