private void transactionToolStripMenuItem_Click(object sender, EventArgs e)
{
if (trForm == null)
{
trForm = new TransactionForm();
trForm.MdiParent = this;
trForm.FormClosed += TransactionFrm_FormClosed;
trForm.Show();
}
else
{
trForm.Activate();
}
}
private void TransactionFrm_FormClosed(object sender, FormClosedEventArgs e)
{
trForm = null;
}