//search button clicked
private void btnsearch_Click(object sender, EventArgs e)
{
if (bh == null)
{
Bug_History bh = new Bug_History();
bh.FormClosed += Bh_FormClosed;
bh.MdiParent = this;
bh.Show();
}
else
{
bh.Activate();
}
}
private void Bh_FormClosed(object sender, FormClosedEventArgs e)
{
bh = null;
//throw new NotImplementedException();
}
