Visual Basic [VB] Programming Tutorials

Visual Basic or VB Programming Tutorials And Articles
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Substrings Left, Right and Mid are three Visual Basic functions to locate sections of a string. All of the following examples use the string "strExample" with the following value. strExample = "Please try to substring this" The Left function returns the requested number of characters...
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Visual Basic was Object-Based, Visual Basic .NET is Object-Oriented, which means that it's a true Object-Oriented Programming Language. Visual Basic .NET supports all the key OOP features like Polymorphism, Inheritance, Abstraction and Encapsulation. Lets have a brief overview of OOP before...
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The controls you select for your application's form are important because the controls (also called tools) provide the application interface for your users. Users interact with your application by clicking the controls and entering text in the controls. Placing and sizing controls are perhaps the...
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Visual Basic 6.0 offers plenty of tools for displaying regular text, but what if you want special effects? This article shows you how to display 3-D text in your program. The Windows API's TextOut function displays text on the screen. The declaration is as follows (place this in a module in...
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Temp files are generally used for temporary storage and data manipulation. This is often necessary for storing user data, user preferences, session information, application cache, and many other types of information. In order to get the name of the file that you can use as a temp file in...
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This is a new class written by me to extract the icon assigned to a file in your current system. Ex: Get the icon you see for mp3 files when you open your music folder. Many at first think this is just a WIN API wrapper for the SHGetfileinfo function. NOPE, that method would just grab the icon...
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Visual Basic 6 provides a function called Environ through which you can get all the environment variables available. It takes string parameter which is name of the Environment variable and returns its value. The Valid Environment strings are ALLUSERSPROFILE APPDATA CI_HOLOS_CLI...
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A class is a part of the program that defines the properties, methods and events of one or more object that will be created during execution. An object is an entity created at run time, which requires memory and some resources and is then destroyed when it's no longer needed or when the application...
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You can also create functions in Visual Basic . They are just like Sub procedures except that they can return a value. You declare a function in much the same way as a Sub procedure, except that you use the Function keyword instead of Sub. Function Syntax Here's the formal syntax for...
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A constant is a meaningful name that takes the place of a number or string that does not change. Constants store values that, as the name implies, remain the same throughout the execution of an application. You can greatly improve the readability of your code and make it easier to maintain by using...
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One of the most reputable changes in the Visual Basic language is the introduction of structured exception handling in VB.NET. While the latest version of the language still supports the On Error Goto type of error handling, it's not preferred; instead, you should use structured exception handling....
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Command buttons appear in almost every window of every Windows application. Command buttons determine when the user wants to do something such as exit the application or begin printing. In almost every case, you will perform these tasks to add a command button to an application: 1. Locate and...
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Put on form Picture Box control and button. Set property ScaleMode to 3-Pixel and post this code: Private Sub Command1_Click() Dim arr(1000, 1000) As Integer Dim i Dim y Dim iSumRed As Integer Dim iSumBlack As Integer iSumRed = 0
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Working with the DataGridView control is easy in Visual Basic.NET. The useful features of this control makes database software development a breeze. The ready-made features such as the properties, methods, functions and events do most of the tasks. What is DataGridView? This is a control in...
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Windows stores some important information (e.g., computer name and user name) in the environment variables. The ability to access these variables to retrieve their values comes in handy in many applications. In this tip, I look at how you can use VB.NET to retrieve the information from the...
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Whenever need to know the number of words in a larger VB.NET string consider using the Split function. In this example of how to use Split, as well as Replace if you have more than one space between words. Working with strings and performing various string operations is important to any Visual...
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Developers often deal with various date calculations in applications. If you need a simple way to figure out how many days there are between two given dates, consider using VB.NET's TimeSpan object. Snippet A shows how you can use the TimeSpan object to obtain the elapsed amount of time...
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When you decide to use a variable, you are in fact asking the computer to use a certain amount of space to hold that variable. Since different variables will be used for different purposes, you should specify the kind of variable you intend to use, then the computer will figure out how much space...
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While core functionality and useability of the application is always one of the most important aspects, various visual effects may improve the way users feel about a particular application. Even though you may be able to implement purely cosmetic features in an application, it's important to keep...
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