private void Picture1_BeforePrint(object sender, EventArgs e)
{
    byte[] bytes = MercatorApi.Api.SqlFileToBytes("<MainDir\\my_picture.jpg");
    if (bytes != null)
    {
        System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);
        Picture1.Image = Image.FromStream(ms);
    }
}