Comment faire pour changer d'Onglet de Contrôle de la Couleur d'arrière-plan (VB.NET)

comment puis-je changer la partie grise en couleur blanche?
Je veux que mon tabcontrol rempli avec plein de couleur blanche.

Pour l'instant ce que j'ai fait, c'est comme cela:

Private Sub TabControl1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles TabControl1.DrawItem
    Dim g As Graphics = e.Graphics
    Dim tp As TabPage = TabControl1.TabPages(e.Index)
    Dim br As Brush
    Dim sf As New StringFormat

    Dim r As New RectangleF(e.Bounds.X, e.Bounds.Y + 2, e.Bounds.Width, e.Bounds.Height - 2)

    sf.Alignment = StringAlignment.Center

    Dim strTitle As String = tp.Text

    'If the current index is the Selected Index, change the color 
    If TabControl1.SelectedIndex = e.Index Then

        'this is the background color of the tabpage header
        br = New SolidBrush(Color.White) ' chnge to your choice
        g.FillRectangle(br, e.Bounds)

        'this is the foreground color of the text in the tab header
        br = New SolidBrush(Color.Black) ' change to your choice
        g.DrawString(strTitle, TabControl1.Font, br, r, sf)

    Else

        'these are the colors for the unselected tab pages 
        br = New SolidBrush(Color.White) ' Change this to your preference
        g.FillRectangle(br, e.Bounds)
        br = New SolidBrush(Color.Black)
        g.DrawString(strTitle, TabControl1.Font, br, r, sf)

    End If
End Sub

et j'ai aussi mis ce à PageLoad fonction:

TabControl1.DrawMode = TabDrawMode.OwnerDrawFixed
For Each tg As TabPage In TabControl1.TabPages
    tg.BackColor = Color.White
Next