(Other activities will reinforce other controls.) This activity was designed to reinforce the use of common form elements rather than introduce new ones. Unit I addresses the use of the Visual Studio development environment constructing forms using a variety of controls/elements naming the forms and elements including multiple forms in a single project and sharing projects via e-mail. It represents a Windows list view control, which displays a collection of items that can be displayed using one of four different views.Unit I Practice-VB Unit I (IDE, Forms, Form Elements & Design) Practice CS 1130 Visual Basic-Fall 2016 Overview It displays a hierarchical collection of labeled items, each represented by a TreeNode. It represents a Windows control that allows the user to select a date and a time and to display the date and time with a specified format. It Implements the basic functionality of a scroll bar control. It represents a Windows progress bar control. It represents a Windows picture box control for displaying an image. It enables the user to select a single option from a group of choices when paired with other RadioButton controls. It represents a Windows combo box control. It represents a Windows control to display a list of items. It represents a Windows text box control. The container for all the controls that make up the user interface. The following table lists some of the commonly used controls − The control classes are defined in the namespace. Functionalities of all these controls are defined in the respective control classes. VB.Net provides a huge variety of controls that help you to create rich user interface. Here, important point to note is the name of the event handler, which is by default Form1_Load, but you can change this name based on your naming convention you use in your application programming. If you want to initialize some variables like properties, etc., then you will keep such code inside Form1_Load() subroutine. Similar way, you can check stub code for click, double click. Here, Handles MyBase.Load indicates that Form1_Load() subroutine handles Load event. Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load You can see this code by double clicking the code which will give you a complete list of the all events associated with Form control − There are various types of events associated with a Form like click, double click, close, load, resize, etc.įollowing is the default structure of a form Load event handler subroutine. For example, when a user clicks a control on a form, the form can raise a Click event and call a procedure that handles the event. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)Īn event is a signal that informs an application that something important has occurred. ![]() ![]() If none of the existing methods can perform your desired task, you can add a method to a class.įor example, the MessageBox control has a method named Show, which is called in the code snippet below − The requirements of such a method depend on the class being used. If you are using a control such as one of those provided by the Toolbox, you can call any of its public methods. There are mainly two categories of methods you will use in your classes − Methods are used to access or manipulate the characteristics of an object or a variable. Control MethodsĪ method is a procedure created as a member of a class and they cause an object to do something. You can refer to Microsoft documentation for a complete list of properties associated with different controls and restrictions applied to them. Most of the properties can be set or read during application execution. You can set any of the form properties using Properties Window. Property is the characteristic you want to change. Object is the name of the object you're customizing. Properties can be set at design time by using the Properties window or at run time by using statements in the program code. A property is a value or characteristic held by a Visual Basic object, such as Caption or Fore Color. Methods cause an object to do something andĮvents are what happens when an object does something.Īll the Visual Basic Objects can be moved, resized or customized by setting their properties. ![]() Every Visual Basic control consists of three important elements − In fact, in Visual Basic, the form itself is an object. An object is a type of user interface element you create on a Visual Basic form by using a toolbox control.
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