private void tàiKhoảnToolStripMenuItem_Click(object sender, EventArgs e) { Dangnhap frmdangnhap = new Dangnhap(); frmdangnhap.ShowDialog(); }
private void MainMenu_Load(object sender, EventArgs e) { Dangnhap frmdangnhap = new Dangnhap(); frmdangnhap.ShowDialog(); }