Programming Forums - Drawing shapes

Hi,

I am trying to develop an drawing board,like MSpaint,

I use the follwing code to draw an circle while cliking a button

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

the code draws the circle,but the problem there with is..all other control went disappear(The whole page only drawn with a single circle)

is anybody there to help me how to override this,
my exact need is draw the objects on mouse event(similarly like MSpaint)

Thanks in advance

Venkatramasamy SN