private void dataTBLGardFrmToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (FrmDataTBLGard.IsDisposed)
     {
         FrmDataTBLGard = new  DataTBLGardFrm();
         FrmDataTBLGard.MdiParent = this;
         FrmDataTBLGard.Show();
     }
     else
     {
         if (FrmDataTBLGard.Visible)
         {
             FrmDataTBLGard.WindowState = FormWindowState.Normal;
             FrmDataTBLGard.Focus();
         }
         else
         {
             FrmDataTBLGard.MdiParent = this;
             FrmDataTBLGard.Show();
         }
     }
 }