I want to select all controls on form by rubber band selection .Here controls is not selecting.

please help me. thanxs

Code:
public void MyMouseMove(Object sender, MouseEventArgs e)
        {
            Point ptCurrent = new Point(e.X, e.Y);
            // If we "have the mouse", then we draw our lines.
            if (bHaveMouse)
            {
                // If we have drawn
...