What is ScrollBar Control in VB.net?
A ScrollBar Control in VB.net is used to create and show vertical and horizontal scroll bars on the Windows form.
It is used when there is a lot of information in a form and we can’t see all of it.
Therefore, we used the VB.NET ScrollBar Control. In general, there are two kinds of ScrollBar: HScrollBar for horizontal scroll bars and VScrollBar for vertical scroll bars.
Let’s create a Scroll Bar in VB.net by dragging a Scroll Bar Control from the Toolbox and dropping it on the form.
ScollBar Control in VB.net Properties
The following given below are some commonly used Properties of the ScrollBar Control
|#||ScollBar Control in VB.net Properties||Description|
|1.||AutoSize||Gets or sets a value indicating whether the ScrollBar is automatically resized to fit its contents.|
|2.||BackColor||Gets or sets the background color for the control.|
|3.||ForeColor||Gets or sets the foreground color of the scroll bar control.|
|4.||ImeMode||Gets or sets the Input Method Editor (IME) mode supported by this control.|
|5.||LargeChange||Gets or sets a value to be added to or subtracted from the Value property when the scroll box is moved a large distance.|
|6.||Maximum||Gets or sets the upper limit of values of the scrollable range.|
|7.||Minimum||Gets or sets the lower limit of values of the scrollable range.|
|8.||SmallChange||Gets or sets the value to be added to or subtracted from the Value property when the scroll box is moved a small distance.|
|9.||Value||Gets or sets a numeric value that represents the current position of the scroll box on the scroll bar control.|
ScrollBar Control in VB.net Methods
The following given below are some commonly used Methods of the ScrollBar Control.
|#||ScrollBar Control in VB.net Methods||Description|
|1.||UpdateScrollInfo||It is used to update the ScrollBar control using the Minimum, maximum, and the value of LargeChange properties.|
|2.||OnScroll(ScrollEventArgs)||It is used to raise the Scroll event in the ScrollBar Control.|
|3.||OnEnabledChanged||It is used to raise the EnabledChanged event in the ScrollBar control.|
|4.||Select||It is used to activate or start the ScrollBar control.|
|5.||OnValueChanged(EventArgs)||It is used to raise the ValueChanged event in the ScrollBar control.|
ScrollBar Control in VB.net Events
The following given below are some commonly used Events of the ScrollBar Control in VB.net.
|#||ScrollBar Control in VB.net Events||Description|
|1.||AutoSizeChanged||The AutoSizeChanged event is found in the ScrollBar control when the value of the AutoSize property changes.|
|2.||Scroll||The Scroll event is found when the Scroll control is moved.|
|3.||TextChangedEvent||It occurs in the ScrollBar control when the value of the text property changes.|
|4.||ValueChanged||A ValueChanged event occurs when the property of the value is changed programmatically or by a scroll event in the Scrollbar Control.|
Let’s create a simple program to understand the use of ScrollBar Control in the VB.NET Windows Forms.
Public Class Form1 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Me.Text = "itsourcecode.com" 'Set the title for a Windows Form Label1.Text = "Use of ScrollBar Control in Windows Form" Label1.ForeColor = Color.DarkBlue Me.AutoScroll = True Me.VScrollBar1.Minimum = 0 Me.VScrollBar1.Maximum = 100 Me.VScrollBar1.Value = 0 Me.VScrollBar1.BackColor = Color.Blue Me.HScrollBar1.Minimum = 0 Me.HScrollBar1.Maximum = 100 Me.HScrollBar1.Value = 35 End Sub End Class
A VB.net ScrollBar Control is used to add Vertical and Horizontal scrolling features to a Windows Forms control that does not have a built-in scrolling feature.
In this article, we discussed How To Create a ScrollBar Control VB.net using Microsoft Visual Studio in Windows Forms at design-time as well as run-time.
After that, we saw how to use various Properties, Methods, and Events.