void ShowBackupForm()
 {
     frmbackup main = new frmbackup();
     main.WindowState = FormWindowState.Maximized;
     main.ShowDialog();
 }
 private void btiTXBackup_Click(object sender, EventArgs e)
 {
     if (activeFrom[13] == 13)
     {
         activeFrom[13] = 0;
         frmbackup frm = new frmbackup();
         frm.MdiParent = this;
         frm.WindowState = FormWindowState.Maximized;
         frm.Show();
     }
     //frmShow(new frmbackup(),13);
 }