private void barButtonItem_LDTruocGiao_ItemClick(object sender, ItemClickEventArgs e) { if (formNguonGocDat == null) { formNguonGocDat = new F_Main_NguonGocDat(); formNguonGocDat.MdiParent = this; formNguonGocDat.FormClosed += new FormClosedEventHandler(formNguonGocDat_FormClosed); formNguonGocDat.Show(); } else { formNguonGocDat.Activate(); } }
void formNguonGocDat_FormClosed(object sender, FormClosedEventArgs e) { formNguonGocDat = null; }