ScrollBar Control in VB.net – Properties, Methods and Events

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

ScrollBar Control in VB.net Methods

The following given below are some commonly used Methods of 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.

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

Program Output:

Summary

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.

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Common use cases for ScrollBar Control

ScrollBar Control is a standard Windows Forms element that appears in most VB.NET desktop apps. Typical uses:

• User input capture. Bind to viewmodel properties for two-way data flow.
• Display of collections. Populate with in-memory lists, database result sets, or file system contents.
• Event-driven behaviors. Wire up Click, SelectedIndexChanged, or KeyDown handlers for interactivity.
• Data validation. Use Validating and Validated events to enforce input rules before persistence.
• Custom styling. Override OnPaint or use owner-draw modes for branded looks.

Wiring ScrollBar Control into your form

The standard pattern for adding ScrollBar Control at runtime looks like this:

Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ' Configure the control's initial state
        Me.Text = "ScrollBar Control Example"
        ' Attach event handlers programmatically
        AddHandler MyControl.Click, AddressOf MyControl_Click
    End Sub

    Private Sub MyControl_Click(sender As Object, e As EventArgs)
        ' React to user interaction here
        MessageBox.Show("Control was clicked")
    End Sub

End Class

Best practices for ScrollBar Control

• Name controls consistently. Use a Hungarian-style prefix (btn, txt, lbl, lst) so the codebehind reads cleanly.
• Group related controls in a Panel or GroupBox. Improves layout maintainability and keyboard tab order.
• Set TabIndex explicitly. Do not rely on design-time order; keyboard navigation matters for accessibility.
• Use data binding when possible. Avoid manual .Text = someValue assignments scattered across the codebehind.
• Handle Dispose(). Custom controls that hold GDI resources must implement IDisposable properly.

Troubleshooting ScrollBar Control

• Event handler does not fire. Confirm the Handles clause matches the exact control name, or that AddHandler was called.
• Design-time appearance differs from runtime. This usually means custom OnPaint code is not respecting DesignMode. Check with Me.DesignMode.
• Control flashes or flickers on redraw. Enable double-buffering by setting DoubleBuffered = True on the parent form.
• Cross-thread exceptions. UI updates from background threads must use Control.Invoke() or the BackgroundWorker.ReportProgress pattern.

Angel Jude Suarez

Full-Stack Developer at PIES IT Solution

Focuses on Python development, machine learning, and AI integration. Has built production AI systems including OpenAI Whisper integration for medical transcription and GPT-4o-powered diagnosis assistance. Strong background in pandas, scikit-learn, and TensorFlow.

Expertise: Python · PHP · Java · VB.NET · ASP.NET · Machine Learning · AI Integration · OpenCV · Django · CodeIgniter
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