private void اضافةموظفجديدToolStripMenuItem_Click(object sender, EventArgs e)
{
if (frm_emp == null)
{
frm_emp = new employee();
frm_emp.MdiParent = this;
frm_emp.FormClosed += new FormClosedEventHandler(frm_emp_FormClosed);
frm_emp.Show();
}
else
frm_emp.Activate();
}
