private void picBackground_Paint(object sender, PaintEventArgs e)

        {

            foreach (Control C in this.Controls)

            {

                if (C is Label)

                {

                    Label L = (Label)C;

                    L.Visible = false;

                    //设置绘制文字的格式  

                    StringFormat strFmt = new System.Drawing.StringFormat();

                    strFmt.Alignment = StringAlignment.Center; //文本垂直居中  

                    strFmt.LineAlignment = StringAlignment.Center; //文本水平居中  

                    e.Graphics.DrawString(L.Text, this.Font, new SolidBrush(this.ForeColor), new RectangleF(L.Left - picBackground.Left, L.Top - picBackground.Top, L.Width, L.Height), strFmt); 

                }

                else if (C is PictureBox)

                {

                    PictureBox L = (PictureBox)C;

                    if (!L.Name.Equals("picBackground"))

                    {

                        L.Visible = false;

                        ImageAttributes attrib = new ImageAttributes();

                        //Bitmap img = new Bitmap(L.Image);

                        Color color = Color.Transparent;

                        attrib.SetColorKey(color, color);

                        e.Graphics.DrawImage(L.Image, new Rectangle(L.Left - picBackground.Left, L.Top - picBackground.Top, L.Width, L.Height), 0, 0, L.Image.Width, L.Image.Height, GraphicsUnit.Pixel, attrib);

                    }

                }

            }

        }