How to change button color using tag or name property

[pacman.]

Hey,

I'm creating a little battleships game and it contains two 10*10 fields which itself contains 200 buttons. I'm creating them using the following code:

private void battleField(int x, int y, int size, string shipName)
        {
            int pointA = 0; // first coordinate

            for (int i = 0; i < size * 10; i += size)
            {
                int pointB = 0; // second coordinate

                for (int t = 0; t < size * 10; t += size)
                {
                    b1 = new Button();
                    b1.Location = new Point(x + t, y + i);
                    b1.Size = new Size(size, size);
                    b1.Name = (shipName + " " + System.Convert.ToString(pointA)+ " " + System.Convert.ToString(pointB));
                    b1.MouseUp += new MouseEventHandler(MainForm_MouseUp);
                    b1.BackColor = customColor;
                    this.Controls.Add(b1);
                    pointB++;
                }
                pointA++;
            }
        }

Later on, when the game has begun, I would want to find a specific button, and change it's color. In web application it could be done using ID and findControl:

Button x = (Button)Panel1.FindControl("f" + Convert.ToString(i));
x.BackColor = Color.Black;

Unfortunately this approach doesn't work in windows forms applications and I haven't found a good way to do it. I tried to do something like this, but I still can't get the specified button to change it's color.

protected void changeColor(int x, int y, Color col) 
        {
            foreach (Control c in this.Controls) 
            {
                if (c.GetType() == typeof(Button)) 
                {
                    if (c.Tag == (System.Convert.ToString(x) + " " + System.Convert.ToString(y))) 
                    {
                        c.BackColor = col;
                    }
                }
            }
        }

Any help would be appreciated.