private void payrollCalculatorToolStripMenuItem1_Click(object sender, EventArgs e)
{
if (payrollCalculatorForm == null)
{
payrollCalculatorForm = new PayrollCalculatorForm();
payrollCalculatorForm.MdiParent = this;
payrollCalculatorForm.FormClosed += PayrollCalculatorForm_FormClosed;
payrollCalculatorForm.Show();
}
else
{
payrollCalculatorForm.Activate();
}
}
private void PayrollCalculatorForm_FormClosed(object sender, FormClosedEventArgs e)
{
payrollCalculatorForm = null;
}