VISUAL BASICS CONTROLS

EDUCBAEDUCBA Menu VB.NET Controls By Priya PedamkarPriya Pedamkar Home » Software Development » Software Development Tutorials » .Net Tutorial » VB.NET Controls VB.NET Controls Introduction to VB.NET Controls VB.NET Controls are the pillars that help in creating a GUI Based Applications in VB.Net quickly and easily. These are objects that you can drag to the Form using the Control toolbox in the IDE. Each VB.NET Control has some properties, events, and methods that can be used to tweak and customize the form to our liking. Properties describe the object Methods are used to make the object do something Events describe what happens when the user/Object takes any action. Once you have added a VB.NET control to the form, you can change its appearance, its text, its default values, position, size, etc. using its properties. The properties can be changed via the Pre parties pane or by adding the specific values of properties into the code editor. Following is the syntax to tweak properties of a control: Start Your Free Software Development Course Web development, programming languages, Software testing & others Object. Property = Value Common Controls in VB.NET Control VB.NET has a variety of controls, below given are the list of commonly used controls. Text Box As you can guess, it is used to accept textual input from the user. The user can add strings, numerical values and a combination of those, but Images and other multimedia content are not supported. Example: Public Class Example1 Private Sub Example1_Load(sender As Object, e As EventArgs) _ Handles MyBase.Load ' Set the caption bar text of the form. Me.Text = "educba.com" End Sub Private Sub btnMessage_Click(sender As Object, e As EventArgs) _ Handles btnMessage.Click MessageBox.Show("Thanks " + txtName.Text + " from all of us at " + txtOrg.Text) End Sub End Class Label It is used to show any text to the user, typically the text in a label does not change while the application is running. Popular Course in this category Sale VB.NET Training (10 Courses, 23 Projects, 4 Quizzes) 10 Online Courses | 23 Hands-on Projects | 108+ Hours | Verifiable Certificate of Completion | Lifetime Access | 4 Quizzes with Solutions 4.5 (8,106 ratings) Course Price $79 $599 View Course Related Courses .NET Training Program (4 Courses, 19 Projects)ADO.NET Training (3 Courses, 18 Projects) Button It is used as a standard Windows Button. In most cases, the Button Control is used to generate a click event, its name, size and appearance are not changed in the runtime. Example: Public Class Form1 Private Sub ButtonExmaple_Load(sender As Object, e As EventArgs) Handles MyBase.Load Me.Text = "educba.com" End Sub Private Sub quitBTN _Click(sender As Object, e As EventArgs) Handles quitBTN.Click Application.Exit() End Sub End Class ListBox As the name suggests, this control works as a way to display a list of items on the application. Users can select any options from the list. Example: Public Class example Private Sub dropexmaple_Load(sender As Object, e As EventArgs) Handles MyBase.Load ListBox1.Items.Add("India") ListBox1.Items.Add("Pakistan") ListBox1.Items.Add("USA") End Sub Private Sub BTN1_Click(sender As Object, e As EventArgs) Handles BTN1.Click MsgBox("The country you have selected is " + ListBox1.SelectedItem.ToString()) End Sub Private Sub ListBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ListBox1.SelectedIndexChanged Textlable2.Text = ListBox1.SelectedItem.ToString() End Sub End Class Combo Box It is similar to the list but it works as a dropdown for the user. A user can enter both text in the box or he can click on the downwards aero on the right side and select any item. Example: Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button2.Click ComboBox1.Items.Clear() ComboBox1.Items.Add("India") ComboBox1.Items.Add("USA") ComboBox1.Items.Add("Japan") ComboBox1.Items.Add("China") ComboBox1.Items.Add("Iceland") ComboBox1.Items.Add("Shri Lanka") ComboBox1.Items.Add("Bangladesh") ComboBox1.Text = "Select from..." End Sub Radio Button Radio Button is one of the popular ways of limiting the user to pick just one option. The programmer can set any of the buttons as default if needed. These buttons are grouped together. Example: Public Class example Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Private Sub Example_RadioButton1_CheckedChanged(sender As Object, _ e As EventArgs) Handles RadioButton1.CheckedChanged Me.BackColor = Color.Black End Sub Private Sub Example_RadioButton2_CheckedChanged(sender As Object, _ e As EventArgs) Handles RadioButton2.CheckedChanged Me.BackColor = Color.White End Sub Private Sub Example_RadioButton3_CheckedChanged(sender As Object, _ e As EventArgs) Handles RadioButton3.CheckedChanged Me.BackColor = Color.Brown End Sub End Class Checkbox Checkboxes are similar to radio buttons in the way that they are also used in groups, however, a user can select more than one item in the group. Example: Public Class Form1 Private Sub Submit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim msg As String = "" If ExampleCheckBox1.Checked = True Then msg = " ExampleCheckBox1 Selected" End If If ExampleCheckBox2.Checked = True Then msg = msg & " ExampleCheckBox2 Selected " End If If ExampleCheckBox3.Checked = True Then msg = msg & ExampleCheckBox3 Selected" End If If msg.Length > 0 Then MsgBox(msg & " selected ") Else MsgBox("No checkbox have beenselected") End If CheckBox1.ThreeState = True End Sub End Class PictureBox This VB.Net control is used to show images and graphics inside a form. The image can be of any supported format and we can select the size of the object in the form too. Example: Private Sub Submit_Click(sender As Object, e As EventArgs) Handles Submit.Click ExamplePictureBox1.ClientSize = New Size(500, 500) ExamplePictureBox1.SizeMode = PictureBoxSizeMode.StretchImage End Sub ScrollBar When the content in the form is too large to be shown at once, we can use ScrollBars to let users scroll to see the remaining content, it can be vertical, horizontal or even both depending on the circumstances. Example: Public Class example Private Sub Example1_Load(sender As Object, e As EventArgs) _ Handles MyBase.Load Dim horizontalscroll As HScrollBar Dim verticalscroll As VScrollBar horizontalscroll = New HScrollBar() verticalscroll = New VScrollBar() horizontalscroll.Location = New Point(15, 300) horizontalscroll.Size = New Size(185, 20) horizontalscroll.Value = 10 verticalscroll.Location = New Point(300, 35) verticalscroll.Size = New Size(20, 180) horizontalscroll.Value = 50 Me.Controls.Add(horizontalscroll) Me.Controls.Add(verticalscroll) Me.Text = "Example" End Sub End Class Date Time Picker In cases where you need to ask the user about date and time, VB.NET has a readymade control that lets the user pick the date and time via a Calendar and a clock. This saves the hassle of creating multiple text boxes for one input. Progress Bar This is used to show a Windows Progress bar, this bar can represent an ongoing process such as moving a file or exporting a document. TreeView Just like in Windows Explorer, a treeview allows us to create a hierarchical collection of items. ListView Similar to the views in Windows Explorer, with ListView control, we can display a collection of items in 4 different views. Conclusion Controls are one of the most useful features of VB.NET in designing and creating Forms. Mastering the controls, their properties and their methods help a lot in creating intuitive and user-friendly User Experiences. Recommended Articles This has been a guide to VB.NET Controls. Here we discuss the basic concept of VB.Net Controls and some most used controls in VB.NET along with code. 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Meaning of Access Key

Access key Article Talk Language Watch Edit In a web browser, an access key or accesskey allows a computer user to immediately jump to a specific web page via the keyboard. They were introduced in 1999 and quickly achieved near-universal browser support. In the summer of 2002, a Canadian Web Accessibility[1] consultancy did an informal survey to see if implementing accesskeys caused issues for users of adaptive technology, especially screen reading technology used by blind and low vision users. These users require numerous keyboard shortcuts to access web pages, as “pointing and clicking” a mouse is not an option for them. Their research showed that most key stroke combinations did in fact present a conflict for one or more of these technologies, and their final recommendation was to avoid using accesskeys altogether. In XHTML 2, a revised web authoring language, the HTML Working Group of the World Wide Web Consortium deprecated the accesskey attribute in favor of the XHTML Role Access Module. However, XHTML 2 has been retired in favor of HTML5, which (as of August 2009) continues to permit accesskeys.[2] Access in different browsers Specifying access keys Use of standard access key mappings See also References External links Last edited 7 days ago by Mindmatrix RELATED ARTICLES Favicon Icon associated with a particular web site Link prefetching Quirks mode Wikipedia Content is available under CC BY-SA 3.0 unless otherwise noted. Privacy policy

Difference between Common Type System (CTS) and Common Language Specifications (CLS)

Common Type System & Common Language Specification Article 09/15/2021 2 minutes to read +5 Is this page helpful? In this article Common Type System Common Language Specification More resources Again, two terms that are freely used in the .NET world, they actually are crucial to understand how a .NET implementation enables multi-language development and to understand how it works. Common Type System To start from the beginning, remember that a .NET implementation is language agnostic. This doesn't just mean that a programmer can write their code in any language that can be compiled to IL. It also means that they need to be able to interact with code written in other languages that are able to be used on a .NET implementation. In order to do this transparently, there has to be a common way to describe all supported types. This is what the Common Type System (CTS) is in charge of doing. It was made to do several things: Establish a framework for cross-language execution. Provide an object-oriented model to support implementing various languages on a .NET implementation. Define a set of rules that all languages must follow when it comes to working with types. Provide a library that contains the basic primitive types that are used in application development (such as, Boolean, Byte, Char etc.) CTS defines two main kinds of types that should be supported: reference and value types. Their names point to their definitions. Reference types' objects are represented by a reference to the object's actual value; a reference here is similar to a pointer in C/C++. It simply refers to a memory location where the objects' values are. This has a profound impact on how these types are used. If you assign a reference type to a variable and then pass that variable into a method, for instance, any changes to the object will be reflected on the main object; there is no copying. Value types are the opposite, where the objects are represented by their values. If you assign a value type to a variable, you are essentially copying a value of the object. CTS defines several categories of types, each with their specific semantics and usage: Classes Structures Enums Interfaces Delegates CTS also defines all other properties of the types, such as access modifiers, what are valid type members, how inheritance and overloading works and so on. Unfortunately, going deep into any of those is beyond the scope of an introductory article such as this, but you can consult More resources section at the end for links to more in-depth content that covers these topics. Common Language Specification To enable full interoperability scenarios, all objects that are created in code must rely on some commonality in the languages that are consuming them (are their callers). Since there are numerous different languages, .NET has specified those commonalities in something called the Common Language Specification (CLS). CLS defines a set of features that are needed by many common applications. It also provides a sort of recipe for any language that is implemented on top of .NET on what it needs to support. CLS is a subset of the CTS. This means that all of the rules in the CTS also apply to the CLS, unless the CLS rules are more strict. If a component is built using only the rules in the CLS, that is, it exposes only the CLS features in its API, it is said to be CLS-compliant. For instance, the are CLS-compliant precisely because they need to work across all of the languages that are supported on .NET. You can consult the documents in the More Resources section below to get an overview of all the features in the CLS. More resources Common Type System Common Language Specification Recommended content Common Type System Explore the type system in .NET. Read about types in .NET (value types or reference types), type definition, type members, and type member characteristics. Framework Libraries Learn how .NET libraries provide implementations for many general and app-specific types, algorithms, and utility functionality. .NET class library overview Learn about the .NET class library. .NET APIs include classes, interfaces, delegates, and value types to provide access to system functionality. What is managed code? Learn how managed code is code whose execution is managed by a runtime, the Common Language Runtime (CLR). Feedback Submit and view feedback for View all page feedback Previous Version Docs Blog Contribute Privacy & Cookies Terms of Use Trademarks © Microsoft 2022

Difference between Common Language infrastructure (CLI) and Common Language Runtime(CLR)

CLR and CLI - What is the difference? .net clr command-line-interface I want to know what exactly is the difference between CLR & CLI? From whatever I have read so far, it seems to indicate that CLI is a subset of CLR. But isn't everything in the CLR mandatory? What exactly may be left out of CLR to create a CLI? Share Improve this question Follow asked Jan 26 '09 at 18:04 Naveen 70.8k●4343 gold badges●170170 silver badges●228228 bronze badges edited Aug 26 '18 at 10:11 Litisqe Kumar 2,380●44 gold badges●2424 silver badges●3838 bronze badges 6 Answers order by votes Up vote 77 Down vote Accepted The CLR is Microsoft's implementation of the CLI standard. Share Improve this answer Follow answered Jan 26 '09 at 18:06 Serafina Brocious 29.9k●1111 gold badges●8787 silver badges●112112 bronze badges edited Jan 26 '09 at 18:15 4 It does that too, you just have to set the target architecture to 'liquid'. – Serafina Brocious Jan 26 '09 at 18:11 1 Thanks for the quick answer. So this means at least theoretically we can have a third party implementation of the CLI which can run on different OS and support .NET components similar to JVM? – Naveen Jan 26 '09 at 18:18 1 @Naveen - take a look at mono which is exactly that. – Kev Jan 26 '09 at 18:22 1 According to this stackoverflow.com/questions/9321803/… That claims that Mono implements the CLR. Is that wrong and is it more correct to say Mono implements the CLI, not the CLR? – barlop Jul 20 '14 at 14:11 1 this answer is not really correct... CLR is the implementation of the VES... see the answer below – adjan Jun 6 '17 at 13:40 Add a comment Up vote 54 Down vote CLR is the execution environment in which a .NET application is safely hosted/run. You can see it as .NET's private Operating System that initiates and loads just before a .NET application starts. The CLR takes care of certain essential requirements of any .NET application that otherwise would require lot of deliberate code to be written in order to implement; requirements that are holistic in nature and essential to any kind of application to run in a good, efficient and safe manner [e.g. Handle memory allocation and release it when not required, avoid dangling pointers, avoid type-casting errors etc. ] CLI on the other hand is a specification/set of guidelines that explains how to implement an application execution environment and the nature of generated application code that allows for multiple high-level languages to be used on different computer platforms without being rewritten for specific architectures. CLI is developed by Microsoft and standardized by ISO and ECMA. The CLR is a practical implementation of CLI's VES [Virtual Execution System] section and forms one of the core components of the MS.NET platform In a layman's language, CLI is a recipe while CLR is the cuisine :-) Share Improve this answer Follow answered Jun 24 '12 at 14:54 Rahul Bhatnagar 587●44 silver badges●66 bronze badges edited Jun 25 '12 at 23:22 Note that this says the same thing as Cody Brocious's answer except with some explanation. It is a matter of opinion how much value the explanation provides. References to .Net might not be accurate; it is my understanding that .Net implements more than the CLI standard. – user34660 Nov 14 '17 at 19:30 Add a comment Up vote 16 Down vote The CLR (Common Language Runtime) is Microsoft's implementation of the VES (Virtual Execution System). The VES along with the CTS (Common Type System), the CLS (common language specification) and the metadata specification are all part of the CLI (Common Language Infrastructure) specification. The VES is a standardized virtual machine specification that must be implemented in order to load and execute CIL (Common Intermediate Language) modules (dll and exe). A VES implementation also provide runtime services such as garbage collection and security. ECMA C# and Common Language Infrastructure Standards Share Improve this answer Follow answered Mar 27 '13 at 3:36 xtrem 1,617●1212 silver badges●1313 bronze badges edited May 9 '18 at 7:51 Up vote 0 Down vote CLR is the .net execution environment where all kind of .net applications are run.For instance, when you write your code with C# or another language from the dot NET stack the compiler compiles and converts it into managed module. A managed module is IL (intermediate language) and metadata.Above all, the important point to remember is that whenever you compile your source code, the compiler translates it into managed module. To clarify, this is not a machine code that your processor will execute.In fact, IL is an intermediate language close to assembly language.Similarly, it is also famous as object orientated machine language. Check this article about more detailed explanation: http://alevryustemov.com/programming/common-language-runtime/ Share Improve this answer Follow answered Jul 2 '19 at 9:17 Alev Ryustemov 150●11 silver badge●99 bronze badges Up vote -1 Down vote As answered, CLR is microsoft implementation. The component itself is called C++/CLI in Visual Studio installer but once it's installed, it shows up as CLR. You can got to add remove programs >> Visual Studio 2009, modify installation and add or remove C++/CLI. It is listed like that as shown in screenshot below but again once installed, the project type is called CLR in visual studio. enter image description here Share Improve this answer Follow answered Apr 6 '20 at 1:22 zar 10.1k●1010 gold badges●8080 silver badges●154154 bronze badges C++/CLI is a complete different thing from CLR. One is a language and the other is a VES implementation. – underthevoid Jul 11 '20 at 9:06 Add a comment Up vote -2 Down vote CLR is the complete environment in which CLI ,CTS,CLS works in integration it also incluse garbage collection,memory management ,security,intemediate language for native code... CLI is a specification for the format of executable code, and the runtime environment that can execute that code. Share Improve this answer Follow answered Jun 17 '13 at 4:56 maddy 1 Your Answer Body Add picture

Lyrics of Edise Ima Abasi By U'kay Michael ft. Jonny Williams and The Team optimist

Me nsuto ima edi-emi o Me nsuto ima edi-emi o Me nsuto ima edi-emi o Edi’tiene mi ekwo! Me nsuto ima edi-emi o Me nsuto ima edi-emi o Jesus amami o o Eyak inno enye ubong [Main song 1] Akanam nkwe Utò ima enye ‘mi o Akanam nkwe Utò mfon ami o Akanam nkwe Utò emem ami o Eyen Abasi amaami Akan akpan ufaan mmi [Main song 2] Edi’se im’Abasi o Edi’se se s’ima anam Ima ima ima ima I’ma Edi’se s’ima anam o Edi’se im’Abasi o Di’se se s’ima anam Ima ima ima ima I’ma Edi’se s’ima anam [Verse] When I think of the goodness of God, And the place where he picked me from; I go dey sing, I go dey dance like this o, Eyen Abasi ama-mi Akan akpan ufan mmi Edi’se im’Abasi o Edi’se se s’ima anam Ima ima ima ima I’ma Edi’se s’ima anam o Edi’se im’Abasi o Di’se se s’ima anam Ima ima ima ima I’ma Edi’se s’ima anam [Main Song 3] Ami mmo’kut Mfon Obong k’idem Mmi o Ami mmo’kut Ima Abasi k’idem Mmi o Enye’nam Ami nsim mfin o Enye ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Enyesin yak Ami nkwò Enye Ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Se owo nt’Ami Obong Anam mkpò’nò Mi o iseghe ndudue Ami nduede enye o MfonObong awak Awawak k’idem Mmi o Ima Obong awak Awawak k’idem Mmi o Se owo nt’Ami Obong Anam mkpò’nò Mi o iseghe ndudue Ami nduede enye o MfonObong awak Awawak k’idem Mmi o Ima Obong awak Awawak k’idem Mmi o Enye’nam Ami nsim mfin o Enye ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Enyesin yak Ami nkwò Enye Ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Eyak Mi o Eyak Mi o Eyak Mi nke kom Abasi Ke mfon Esie Eyak Mi o Eyak Mi o Ke mikpidighe Abasi Uwem Mmi akpatak Eyak Mi o Eyak Mi o Eyak Mi nke kom Abasi Ke mfon Esie Eyak Mi o Eyak Mi o Ke mikpidighe Abasi Uwem Mmi akpatak Enye’nam Ami nsim mfin o Enye ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Enyesin yak Ami nkwò Enye Ama’yanga Mi Kpukpru s’ubok Esie anamde y’ami Enyene nyòò Ukay Michael Edise Ima (Till fade) 1120110 TAGS2022 GOSPEL SONGSIBIBIO GOSPEL SONGSLATEST GOSPEL SONGSNIGERIAN GOSPEL SONGS Previous article “Ding Ding Dong” Audio/Video by Tosin Bee (Christmas Medley) Next article [Album] Elijah Oyelade – Songs of the Spirit Ebenezer ekpenyong Ebenezer Ekpenyong Is The CEO/Founder of Premium9ja.com, Blogger, Social Media Influencer, Media PR, %101 JESUS Lover. RELATED ARTICLESMORE FROM AUTHOR GUC Drop It At My Feet New Music “Drop It At My Feet” (Cover) by Min. GUC Joshua Eze Blessings No Dey Tire Jehovah New Music [Music] Joshua Eze – Blessings No Dey Tire Jehovah Superseyi Upward & Forward New Music “Upward & Forward” by Superseyi & Lyrics LEAVE A REPLY Comment: Name:* Email:* Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. “It’s A Game Over” Album – iNtenxity Home Promote Music Donate/Support Us Contact Us About Us © Premium9ja.com 2016 - 2022 Close