VB.NET CONTROLS

Explain different windows form controls in VB.Net

VB.Net contains a very rich amount of the controls for the windows application.

Every controls have three important elements which are Properties and Events

Properties means all the controls can resized, customized and moved. A property is a value or characteristics held by the particular control.

An Event means a signal that informs an application that something important has occurred.

Some of the common Properties, Method and Events of all controls are as below.

Common Properties of all controls which are listed below:

Property Name	Description
Text	Display the name of the control on the windows forms
Name	Contains the name of the controls by which the control can be identified
Minimum Size	With the help of the this property we can manage the minimum size of the control
Maximum Size	With the help of the this property we can manage the maximum size of the control
Size	With the help of the this property we can manage the size of the control
Modifier	To handle the access level of control public, private, protected or friend
Font	To set the font style of that control
TabIndex	To set the tab index of the particular control
Visible	Control should be visible or not visible we can set with this property

Common Events of all controls which are listed:

Event Name	Description
Click	When we click on the control and we have to execute any code that code will be written in this event
MouseClick	When mouse will be clicked on the control and we have to execute any code that code will be written in this event
DoubleClick	When we double click on the control and we have to execute any code that code will be written in this event
DragLeave	When we remove the mouse from the control and at that time if any code have to be executed that code will be written in this event
SizeChanged	When we changed the size of the control and at that time if any code have to be executed that code will be written in this event

1. Form Control

The container for all the controls that make up the user interface.

Properties:

Property Name	Description
StartPosition	This property determines the initial position of the form when it's first displayed.
MinimizeBox	By default, this property is True and you can set it to False to hide the Minimize button on the title bar.
MaximizeBox	By default, this property is True and you can set it to False to hide the Maximize button on the title bar.
ControlBox	By default, this property is True and you can set it to False to hide the Minimize, Maximize and close button on the title bar.
IsMDIContainer	By default, this property is False and you can set it to True for generating MDI application.

Events:

Event Name	Description
Load	Occurs when the form is loaded for the first time.
Closed	Occurs before the form is closed.
Closing	Occurs when the form is closing
HelpButtonClicked	Occurs when the Help button is clicked.

2. Button Control

It represents a Windows button control.

Properties:

Property Name	Description
BackColor	Gets or sets the background color of the control.
DialogResult	Gets or sets a value that is returned to the parent form when the button is clicked. This is used while creating dialog boxes.
Image	Gets or sets the image that is displayed on a button control.
Font	Sets the font.
Size	Sets the size.
Enable	By default, this property is True and you can set it to False to disable the working of button.

Events:

Event Name	Description
GotFocus	Occurs when the control receives focus.
TextChanged	Occurs when the Text property value changes.
Validated	Occurs when the control is finished validating.
Click	Occurs when user clicks the Button.
FontChange	Occurs when font is changed.

3. Label Control

It represents a standard Windows label.

Properties:

Property Name	Description
Autosize	Gets or sets a value specifying if the control should be automatically resized to display all its contents.
BorderStyle	Gets or sets the border style for the control.
Text	Used to Display the text.
TextAlign	Gets or sets the alignment of text in the label.

Events:

Event Name	Description
Leave	Occurs when the input focus leaves the control.
LostFocus	Occurs when the control loses focus.
TextChanged	Occurs when the Text property value changes.

4. TextBox Control

It represents a Windows text box control.

Properties:

Property Name	Description
CharacterCasing	Gets or sets whether the TextBox control modifies the case of characters as they are typed.
Multiline	Gets or sets a value indicating whether this is a multiline TextBox control.
PasswordChar	Gets or sets the character used to mask characters of a password in a single-line TextBox control.
Readonly	By default, this property is True and you can set it to False to make the text Readonly.
Visible	By default, this property is True and you can set it to False to make the Textbox invisible.

Events:

Event Name	Description
TextAlignChanged	Occurs when the TextAlign property value changes.
TextChanged	Occurs when the text in the textbox changes.

5. RadioButton Control

It enables the user to select a single option from a group of choices when paired with other RadioButton controls.

Properties:

Property Name	Description
CheckAlign	Gets or sets the location of the check box portion of the radio button.
Checked	Gets or sets a value indicating whether the control is checked.

Events:

Event Name	Description
AppearanceChanged	Occurs when the value of the Appearance property of the RadioButton control is changed.
CheckedChanged	Occurs when the value of the Checked property of the RadioButton control is changed.

6. Checkbox Control

It represents a Windows CheckBox.

Properties:

Property Name	Description
CheckAlign	Gets or sets the horizontal and vertical alignment of the check mark on the check box.
Checked	Gets or sets a value indicating whether the check box is selected.
ThreeState	Gets or sets a value indicating whether or not a check box should allow three check states rather than two.

Events:

Event Name	Description
AppearanceChanged	Occurs when the value of the Appearance property of the check box is changed.
CheckedChanged	Occurs when the value of the Checked property of the CheckBox control is changed.
CheckStateChanged	Occurs when the value of the CheckState property of the CheckBox control is changed.

7. ComboBox Control

It represents a Windows combo box control.

Properties:

Property Name	Description
DataBindings	Gets the data bindings for the control.
DataSource	Gets or sets the data source for this ComboBox.
DropDownStyle	Gets or sets a value specifying the style of the combo box.
Items	Add the items to be displayed.

Events:

Event Name	Description
DropDown	Occurs when the drop-down portion of a combo box is displayed.
DropDownClosed	Occurs when the drop-down portion of a combo box is no longer visible.
SelectedIndexChanged	Occurs when the SelectedIndex property of a ComboBoxhas changed.

8. ListView Control

It represents a Windows list view control, which displays a collection of items that can be displayed using one of four different views.

Properties:

Property Name	Description
Columns	Gets the collection of all column headers that appear in the control.
HeaderStyle	Gets or sets the column header style.
Items	Gets a collection containing all items in the control.

Events:

Event Name	Description
ItemCheck	Occurs when an item in the control is checked or unchecked.
ColumnClick	Occurs when a column header is clicked.
SelectedIndexChanged	Occurs when the selected index is changed.