Protected Sub BtnCircle_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnCircle.Click
        DrwTool = "Circle"
        objGraphics = System.Drawing.Graphics.FromImage(objBitmap)
        objGraphics.Clear(Drawing.Color.White)

        'Code to Draw Circle
        Dim r As New Drawing.Pen(Drawing.Color.Black, 5)
        Dim rect As New Drawing.Rectangle(300, 10, 280, 280)
        objGraphics.DrawEllipse(r, rect)
        Dim b1 As New Drawing.SolidBrush(Drawing.Color.BurlyWood)
        'objGraphics.FillEllipse(b1, rect)
        objGraphics.DrawArc(Drawing.Pens.DarkBlue, 50, 50, 100, 100, 0, 180)
        objGraphics.DrawArc(Drawing.Pens.DarkBlue, 50, 50, 100, 100, 180, 180)
        'objGraphics.FillEllipse(Drawing.Brushes.White, 30, 60, 280, 280)


        'objBitmap.Save(Server.MapPath("x.jpg"), Drawing.Imaging.ImageFormat.Jpeg)
        objBitmap.Save(Response.OutputStream, Drawing.Imaging.ImageFormat.Gif)


        objBitmap.Dispose()
        objGraphics.Dispose()
    End Sub