Visual basic program code sample

Introduction to Visual Basic Part 2. Accessing databases using the Data Environment control. Mike Rounding Rod Stephens. Building a Transparent ActiveX Control that lets you click on a non-rectangular image. Mike Rounding Shaun Kaasten. Dynamic queries and databases: simple example on how you can use sliders to build a query to a database. The "Bitton" control, beginning guide to building ActiveX controls a few different ways along with some ActiveX explanation. This program demonstrates dragging and dropping from explorer and between forms and also includes a cool control moving code module.

This is a step-by-step tutorial for how to integrate Macromedia Flash into your VB applications. A simple hello world program that illustrates a basic VB program as well as the command button and timer control. Saul Greenberg.

We use this nonsense program as a first VB exercise for students to do. These two vb Projects illustrates two ways to cycle through images stored in a local directory. A marquee an automatically scrolling text region is used to illustrate a Timer, a status bar and a checkbox control, and simple graphical repositioning,.

An example of how to use listboxes as well as how to put images into buttons. Rod Stephens, modified by Saul Greenberg. Illustrates how to play a wave file in Visual Basic. Illustrates two simple sketchpads. A simple object-oriented drawing editor that allows a user to create, move and erase squares. The program illustrates how to do simple object-based interactive graphics in VB how to use a collection how to use a class. This program is similar to the drawing editor above, but used for completely different purposes.

Illustrates how to create a very simple table lens that toggles cells between graphical and textual views. Illustrates how to Bitblit a picture on another picture, and how to drag it around. Illustrates how to use the Tree control and how to drag items around different parts of the tree. An example application that lets a user interactively move different kinds of controls on a display.

Illustrates how to create a simple class that raises events. Illustrates a database with the flex control. Illustrates how you can clip the shape of a control or form to a variety of regions.

In this tutorial, Will see some basic string operation like how to print string and char in visual basic. Check the visual basic program for mathematical operations. Start any programming language with some string operation is a really good idea.

ReadLine is used to read the next line here we are using it to hold the screen. Declare a variable in visual basic is really simple. Dim str As String is a variable decoration.

The WriteLine method is defined as a shared also known as a static method. Shared methods are invoked by qualifying them with their class name in this case, Console.

Here is a program that uses a class instead of a standard module to house its Main subroutine. Note that Main is declared with the Shared modifier. It is compiled and run in the same way as the standard module example, and it produces the same output. There is no technical reason to choose one implementation over the other. This is similar to the hello, world console application, but with extra stuff required since this is a GUI application.

The HelloWindows class has something that Visual Basic programs have never seen before, the Inherits statement:. The Visual Basic. NET language has class inheritance. The HelloWindows class inherits from the Form class, which is defined in the System.

Forms namespace. Class inheritance and the Inherits statement are discussed in Chapter 2. The next line declares a label control that will be used for displaying the text Hello, Windows :. As is the case with console applications, GUI applications must have a shared subroutine called Main :.

This Main method creates an instance of the HelloWindows class and passes it to the Run method of the Application class defined in the System. The Run method takes care of the housekeeping of setting up a Windows message loop and hooking the HelloWindows form into it.

Like Main , New has special meaning to the Visual Basic. NET compiler. Subroutines named New are compiled into constructors. A constructor is a method that has no return value but can have arguments and is automatically called whenever a new object of the given type is instantiated. Constructors are explained further in Chapter 2. The interesting thing to note is how different this is from how Visual Basic 6 represented form design.

In Visual Basic 6, form layout was represented by data in. This data was not code, but rather a listing of the properties and values of the various elements on the form. NET, this approach is gone. Instead, Visual Basic. NET statements must explicitly instantiate visual objects and set their properties.

When forms are designed in Visual Studio. NET using its drag-and-drop designer, Visual Studio. NET creates this code on your behalf. The command line to compile the Hello, Windows program is:. Your console window should look similar to the following screenshot:.

This code replaces the existing WriteLine statement. Then name the file CalculateThis. Enter the following code between the Module Program line and the End Module line:. Click CalculateThis to run your program. Then, in the Configure your new project window, type or enter CalculateThis in the Project name box. Enter the following code between the Module Program line and End Module line:.

In Program. Select the green Start button next to CalculateThis to run your program. Now that you've created an app, you might want to add it to a Git repository. We've got you covered. Git is the most widely used modern version control system, so whether you're a professional developer or you're learning how to code, Git can be very useful. There, you can find cheat sheets, a popular online book, and Git Basics videos.

To associate your code with Git, you start by creating a new Git repository where your code is located. The repository name auto-populates based on your folder location. By default, your new repository is private, which means you're the only one who can access it.

Whether your repository is public or private, it's best to have a remote backup of your code stored securely on GitHub. Even if you aren't working with a team, a remote repository makes your code available to you from any computer. You can use this icon to pull any incoming commits or push any outgoing commits.

You can also choose to view these commits first. The second icon with the pencil shows the number of uncommitted changes to your code. You can select this icon to view those changes in the Git Changes window. To learn more about how to use Git with your app, see the Visual Studio version control documentation.

Visual Basic is a type-safe programming language that's designed to be easy to learn. Visual Studio is an integrated development suite of productivity tools for developers.