How to make a fixed background on a DataGridView - vb.net

Question

I made a custom control that inherits DataGridView in order to have a transparent background. Now I am trying to set up an scroll feature on a timer that scrolls down one row every second. However, when I try to scroll (vertically), the background image is not fixed. Is there any way to make the background image fixed when scrolling?
EDIT: Here is the code for handling the scroll timer.
Private Sub Sub1
'Some previous code
If DataGridView1.Rows.Count > 10 Then
ScrollIndex1 = 0 'Integer for scroll index
DGVAutoScroll()
End If
End Sub
Private Sub DGVAutoScroll()
Timer2.Enabled = True
Timer2.Interval = 1000
End Sub
Private Sub Timer2_Tick(sender As Object, e As EventArgs) Handles Timer2.Tick
If ScrollIndex1 = DataGridView1.Rows.Count - 1 Then
ScrollIndex1 = 0
DataGridView1.FirstDisplayedScrollingRowIndex = ScrollIndex1
ScrollIndex1 += 1
Else
DataGridView1.FirstDisplayedScrollingRowIndex = ScrollIndex1
ScrollIndex1 += 1
End If
End Sub
'Custom DataGridView class
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class MyDGV
Inherits DataGridView
Public Property DGVHasTransparentBackground As Boolean
Get
Return Nothing
End Get
Set()
SetTransparentProperties(True)
End Set
End Property
Public Property ScrollBar
Get
Return Nothing
End Get
Set(value)
BackgroundColor = Color.Transparent
End Set
End Property
Public Sub New()
DGVHasTransparentBackground = True
End Sub
Private Sub SetTransparentProperties(ByRef SetAsTransparent As Boolean)
MyBase.DoubleBuffered = True
MyBase.EnableHeadersVisualStyles = False
MyBase.ColumnHeadersDefaultCellStyle.BackColor = Color.Transparent
MyBase.RowHeadersDefaultCellStyle.BackColor = Color.Transparent
SetCellStyle(Color.Transparent)
End Sub
Protected Overrides Sub PaintBackground(graphics As System.Drawing.Graphics, clipBounds As System.Drawing.Rectangle, gridBounds As System.Drawing.Rectangle)
MyBase.PaintBackground(graphics, clipBounds, gridBounds)
Dim rectSource As New Rectangle(MyBase.Location, MyBase.Size)
Dim rectDest As New Rectangle(0, 0, rectSource.Width, rectSource.Height)
Dim b As New Bitmap(Parent.ClientRectangle.Width, Parent.ClientRectangle.Height)
Graphics.FromImage(b).DrawImage(MyBase.Parent.BackgroundImage, Parent.ClientRectangle)
graphics.DrawImage(b, rectDest, rectSource, GraphicsUnit.Pixel)
End Sub
Protected Overrides Sub OnColumnAdded(e As System.Windows.Forms.DataGridViewColumnEventArgs)
MyBase.OnColumnAdded(e)
SetCellStyle(Color.Transparent)
End Sub
Private Sub SetCellStyle(ByVal cellColour As Color)
For Each col As DataGridViewColumn In MyBase.Columns
col.DefaultCellStyle.BackColor = cellColour
col.DefaultCellStyle.SelectionBackColor = cellColour
Next
End Sub
End Class

Answer 1

It looks like I had to call DataGridView1.SelectAll() within the timer tick. Thanks everyone.

Answer 2

I assume you want an image behind data (datagridview).
If datagridview is transparent then just add an image in the background. Stick it on the form or on an item behind datagridview. It will no scroll since it would be outside datagridview
Change image alpha if data not clearly visible.