Ack, need coding help

[PsychoticPsymon]

//Section1
            PictureBox picBoard = new PictureBox();
            this.Controls.Add(picBoard);
            picBoard.MouseDown += new System.Windows.Forms.MouseEventHandler(picBoard_MouseDown);
//Section1
//Section2
        private void picBoard_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            /*  1   2   3   4   5   6   7   8
             *  9   10  11  12  13  14  15  16
             *  17  18  19  20  21  22  23  24
             *  25  26  27  28  29  30  31  32
             *  33  34  35  36  37  38  39  40
             *  41  42  43  44  45  46  47  48
             *  49  50  51  52  53  54  55  56
             *  57  58  59  60  61  62  63  64*/
            int TotalX = [B]sender.Size.Width[/B], TotalY = [B]sender.Size.Height[/B], ClickX = e.X, ClickY = e.Y;
*snip*
        }
//Section2

How can I get it so that I can, in section 2, get the size of the picturebox that I have created. In other words, when I click on picBoard, how can I make it so that picBoard is the sender without messing up a different part of the application?