How do I custom paint the tab panel in the TabControlAdv ?

  public Form1()

        {

            InitializeComponent();

            TabRendererFactory.RegisterTabType(TabRendererMetro.TabStyleName, typeof(TabRendererMetro), new CustomTabPanelProperty());

            this.tabControlAdv1.TabStyle = typeof(TabRendererMetro);

        }

public class CustomTabPanelProperty : Syncfusion.Windows.Forms.Tools.TabPanelProperty3D

    {

        public override void OnPaintPanelBackground(ITabControl tabControl, Graphics g, Color bgColor, Rectangle bounds)

        {

            System.Drawing.Drawing2D.LinearGradientBrush lgb = new System.Drawing.Drawing2D.LinearGradientBrush(bounds, Color.Red, Color.GreenYellow, System.Drawing.Drawing2D.LinearGradientMode.Vertical);

            g.FillRectangle(lgb, bounds);

        }

    }

Public Sub New()

                InitializeComponent()

                TabRendererFactory.RegisterTabType(TabRendererMetro.TabStyleName, GetType(TabRendererMetro), New CustomTabPanelProperty())

                Me.tabControlAdv1.TabStyle = GetType(TabRendererMetro)

End Sub

Public Class CustomTabPanelProperty

                Inherits Syncfusion.Windows.Forms.Tools.TabPanelProperty3D

                Public Overrides Sub OnPaintPanelBackground(ByVal tabControl As ITabControl, ByVal g As Graphics, ByVal bgColor As Color, ByVal bounds As Rectangle)

                Dim lgb As New System.Drawing.Drawing2D.LinearGradientBrush(bounds, Color.Red, Color.GreenYellow, System.Drawing.Drawing2D.LinearGradientMode.Vertical)

                g.FillRectangle(lgb, bounds)

                End Sub

End Class