// them moi vat tu
private void btn_Add_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
frm_AddNewSupplies frm = new frm_AddNewSupplies( );
frm.FormClosed += new FormClosedEventHandler(dongformSupplies);
frm.ShowDialog( );
}
private void btn_AddNewSuppelies_Click(object sender, EventArgs e)
{
frm_AddNewSupplies frm = new frm_AddNewSupplies();
frm.FormClosed += new FormClosedEventHandler(dongformSearch);
frm.ShowDialog();
}