void dasb_FormClosed(object sender, FormClosedEventArgs e)
{
dasb = null;
}
private void updateBonusAmountToolStripMenuItem_Click(object sender, EventArgs e)
{
if (dasb == null)
{
dasb = new DeleteASalaryBonus();
dasb.MdiParent = this;
dasb.FormClosed += dasb_FormClosed;
dasb .Show();
}
else
{
dasb .Activate();
}
}