private void đăngNhậpToolStripMenuItem_Click(object sender, EventArgs e) { fr_Dangnhap fr = new fr_Dangnhap(); this.Hide(); fr.Show(); }
private void timer1_Tick(object sender, EventArgs e) { fr_Dangnhap fr = new fr_Dangnhap(); fr.Show(); this.Hide(); timer1.Enabled = false; }