private void quảnLýTàiKhoảnToolStripMenuItem_Click(object sender, EventArgs e)
{
QuanLyTaiKhoan frm = new QuanLyTaiKhoan();
frm.MdiParent = this;
frm.Show();
}
private void btnPhanQuyen_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
QuanLyTaiKhoan ql = new QuanLyTaiKhoan();
ql.Show();
}