private void bt_dangnhap_Click(object sender, EventArgs e) { frm_taikhoan i = new frm_taikhoan(); i.MdiParent = this; i.Show(); }
private void bt_giohang_Click(object sender, EventArgs e) { frm_taikhoan abcd = new frm_taikhoan(); abcd.MdiParent = this; this.Show(); }
private void bt_quaylai_Click(object sender, EventArgs e) { frm_taikhoan k = new frm_taikhoan(); k.ShowDialog(); //k.Close(); }