VB.NET CheckBox Control

The CheckBox control is a control that allows the user to select or deselect options from the available options. When a checkbox is selected, a tick or checkmark will appear on the Windows form.

Let's create a CheckBox control in the VB.NET Windows form using the following steps.

Step 1: We need to drag the CheckBox control from the toolbox and drop it to the Windows form, as shown below.

Step 2: Once the CheckBox is added to the form, we can set various properties of the checkbox by clicking on the CheckBox control.

CheckBox Properties

There are some properties of the VB.NET CheckBox control.

Property	Description
Default	It is used to get the default size of the checkbox.
AutoCheck	The AutoCheck property is used to check whether the checked value or appearance of control can be automatically changed when the user clicked on the CheckBox control.
CheckAlign	It is used to set the checkmark's alignment, such as horizontal or vertical on the checkbox.
Appearance	The Appearance property is used to display the appearance of a checkbox control by setting a value.
CheckState	The CheckState property is used to verify whether the checkbox status is checked in the window form.
ThreeState	The ThreeState property is used to check whether the control allows one to set three check positions instead of two by setting values.
FlatStyle	It is used to obtain or set the flat appearance of a checkbox.

CheckBox Methods

There are some Methods of the VB.NET CheckBox control.

Method	Description
OnClick	The OnClick method is used to fetch the Click event in the CheckBox control.
OnCheckStateChanged	It is used to call the CheckStateChanged event in the CheckBox control.
ToString	The ToString method is used to return the current string of the CheckBox control.
OnCheckedChanged	When the Checked property is changed in the CheckBox control, the OnCheckedChanged events occur.
OnMouseUp	It is used when it receives the OnMouseUp event in the CheckBox control.

CheckBox Events

There are some Events of the VB.NET CheckBox control.

Event	Description
CheckedChanged	The CheckedChanged event is found when the value of the checked property is changed to CheckBox.
DoubleClick	It occurs when the user performs a double click on the CheckBox control.
CheckStateChanged	It occurs when the value of the CheckState property changes to the CheckBox control.
AppearanceChanged	It occurs when the property of the Appearance is changed to the CheckBox control.

Let's create a program to understand the uses of CheckBox control in the VB.NET form.

Checkbx.vb

Public Class Checkbxvb
    Private Sub Checkbxvb_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.Text = "javaTpoint.com" ' Set the title name of the form
        Label1.Text = "Select the fruits name"
        CheckBox1.Text = "Apple"
        CheckBox2.Text = "Mango"
        CheckBox3.Text = "Banana"
        CheckBox4.Text = "Orange"
        CheckBox5.Text = "Potato"
        CheckBox6.Text = "Tomato"
        Button1.Text = "Submit"
        Button2.Text = "Close"
    End Sub
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim fruit As String
        fruit = " "
        If CheckBox1.Checked = True Then
            fruit = "Apple"
        End If
        If CheckBox2.Checked = True Then
            'fruit = CheckBox2.Text
            fruit = fruit & " Mango"
        End If
        If CheckBox3.Checked = True Then
            fruit = fruit & " Banana"
        End If
        If CheckBox4.Checked = True Then
            fruit = fruit & " Orange"
        End If
        If CheckBox5.Checked = True Then
            fruit = fruit & " Potato"
        End If
        If CheckBox6.Checked = True Then
            fruit = fruit & " Tomato"
        End If
        If fruit.Length <> 0 Then
            MsgBox(" Selected items " & fruit)
        End If
        CheckBox1.ThreeState = True
    End Sub
    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        End 'terminate the program
    End Sub
End Class

Output:

Now select the fruit name by clicking on the items.

Now click on the Submit button, it displays the following output on your screen.

Next TopicPictureBox Control

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