Public ReadOnly Property TabStripRectangle As Rectangle

Dim instance As PaintTabStripEventArgs
Dim value As Rectangle
 
value = instance.TabStripRectangle

public Rectangle TabStripRectangle {get;}

private void Fpspread1PaintTabStrip(object sender, FarPoint.Win.Spread.PaintTabStripEventArgs e) 
{ 
       e.Graphics.FillRectangle(Brushes.Blue, new RectangleF(e.TabStripRectangle.X, e.TabStripRectangle.Y, e.TabStripRectangle.Width, e.TabStripRectangle.Height)); 
}

Private Sub Fpspread1PaintTabStrip(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.PaintTabStripEventArgs) Handles
FpSpread1.PaintTabStrip
      e.Graphics.FillRectangle(Brushes.Blue, New RectangleF(e.TabStripRectangle.X, e.TabStripRectangle.Y, e.TabStripRectangle.Width, e.TabStripRectangle.Height))
End Sub