public void ShowAlert()
 {
     try
     {
         DataTable dtTB=GetThongBao();
         foreach (DataRow rowtb in dtTB.Rows)
         {
             AlertForm alert = new AlertForm(controlBroadCast);
             alert.Name = "lert " + rowtb["ID"].ToString();
             alert.Text = rowtb["CHU_DE"].ToString();
             alert.MouseDown += new MouseEventHandler(control_MouseDown);
             lblthongbao = new LabelControl();
             lblthongbao.Location = new System.Drawing.Point(10, 23);
             lblthongbao.AutoSizeMode = LabelAutoSizeMode.None;
             lblthongbao.Size = new System.Drawing.Size(230, 52);
             lblthongbao.ImageAlignToText = ImageAlignToText.LeftCenter;
             lblthongbao.AllowHtmlString = true;
             lblthongbao.Appearance.TextOptions.WordWrap = WordWrap.Wrap;
             lblthongbao.Appearance.Image = HelpImage.getImage4848("broadcast.png");
             lblthongbao.ForeColor = Color.Blue;
             lblthongbao.Cursor = Cursors.Hand;
             lblthongbao.Text = rowtb["CHU_DE"].ToString();
             lblthongbao.MouseDown += new MouseEventHandler(control_MouseDown);
             lblthongbao.Tag = rowtb;
             alert.Controls.Add(lblthongbao);
             alert.Tag = rowtb;
             alert.ShowForm(formMain);
         }
     }
     catch { }
 }