一个关于拼图算法的问题(倾家荡产高分结贴)

现在随机生成一些PictrueBox 控件，如何把这些pictureBox合理的拼在一个Panel控件里，每个PictrueBox控件不可有重叠的部门，只能是边与边相切。pictrueBox的宽与高可以互换(此为模拟旋转90度)。还有要注意的是PictrueBox必须被Panel包含。
非常感谢您的解答，有答案的话可以回贴或发送到.向无私的好同志致敬
public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            RandPictrueBox();
        }        public void RandPictrueBox()
        {
            panel1.Controls.Clear();            Random rad = new Random();
            List<PictureBox> lst = new List<PictureBox>();
            int areas = 0;
            while (areas < panel1.Width * panel1.Height)
            {
                PictureBox picBox = new PictureBox();
                picBox.MouseDown += new MouseEventHandler(picBox_MouseDown);
                picBox.MouseMove += new MouseEventHandler(picBox_MouseMove);
                picBox.MouseUp += new MouseEventHandler(picBox_MouseUp);
                picBox.BackColor = Color.FromArgb(rad.Next(0, 255), rad.Next(0, 255), rad.Next(0, 255));
                picBox.BorderStyle = BorderStyle.Fixed3D;
                picBox.Location = new Point(0, 0);
                panel1.Controls.Add(picBox);
                picBox.Width = rad.Next(panel1.Width / 7, panel1.Width/3);
                picBox.Height = rad.Next(panel1.Height / 5, panel1.Height/3);
                areas += picBox.Width * picBox.Height;                lst.Add(picBox);
            }            lst.Sort(delegate(PictureBox pic1, PictureBox pic2) {
                int a1 = pic1.Width * pic1.Height;
                int a2 = pic2.Width * pic2.Height;
                return a2.CompareTo(a1);
            });            DoSpellBoard();
            this.Text = areas.ToString() + "/" + (this.panel1.Width*this.panel1.Height);
        }
        public void DoSpellBoard()
        {            throw new Exception("请高手赐教");
        }
        void picBox_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                allowMove = false;
                sPoint = Point.Empty;
            }
        }        void picBox_MouseMove(object sender, MouseEventArgs e)
        {
            if (allowMove && e.Button == MouseButtons.Left)
            {
                PictureBox picBox = sender as PictureBox;
                picBox.Location = new Point(picBox.Location.X + e.X - sPoint.X, picBox.Location.Y + e.Y - sPoint.Y);
            }
        }        bool allowMove = false;
        Point sPoint = Point.Empty;
        void picBox_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                allowMove = true;
                sPoint = e.Location;
            }
        }
    }