private void Form1_Load(object sender, EventArgs e)
{
ReportHeader reportHeader = new ReportHeader();
this.Controls.Add(reportHeader);
Bitmap bmp = new Bitmap(1100, 800);
reportHeader.DrawToBitmap(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height));
reportHeader.Hide();
this.BackgroundImage = bmp;
}