private void button_NhanVien_Click(object sender, EventArgs e)
{
ManageEmployeeForm form = new ManageEmployeeForm();
form.Show();
//ChiaCa_Load(null,null);
}
private void quảnLýNhânVienToolStripMenuItem_Click(object sender, EventArgs e)
{
ResetForm();
manageEmployeeForm.Show();
}