How to customize the appearance of the Dockable controls?

//To paint dockable control's caption
this.dockingManager1.ProvideGraphicsItems += new Syncfusion.Windows.Forms.Tools.ProvideGraphicsItemsEventHandler(this.dockingManager1_ProvideGraphicsItems);
private void dockingManager1_ProvideGraphicsItems(object sender, Syncfusion.Windows.Forms.Tools.ProvideGraphicsItemsEventArgs arg)
{
//To set the back color of the dock caption
arg.CaptionBackground = Brushes.Pink;
//To set the caption font
arg.CaptionFont = new Font(this.Font.FontFamily, 11, FontStyle.Underline);
//To set the caption fore color
arg.CaptionForeground = Color.Blue;
//To set the caption back color
arg.Control.BackColor = Color.White;
}

'To paint dockable control's caption
AddHandler dockingManager1.ProvideGraphicsItems, AddressOf dockingManager1_ProvideGraphicsItems
Private Sub dockingManager1_ProvideGraphicsItems(ByVal sender As Object, ByVal arg As Syncfusion.Windows.Forms.Tools.ProvideGraphicsItemsEventArgs)
'To set the back color of the dock caption
arg.CaptionBackground = Brushes.Pink
'To set the caption font
arg.CaptionFont = New Font(Me.Font.FontFamily, 11, FontStyle.Underline)
'To set the caption fore color
arg.CaptionForeground = Color.Blue
'To set the caption back color
arg.Control.BackColor = Color.White
End Sub