private void ToolStripMenuItemDangXuat_Click(object sender, EventArgs e) { frmDangNhap dn = new frmDangNhap(); dn.Show(); this.Close(); }
private void button1_Click(object sender, EventArgs e) { frmDangNhap open = new frmDangNhap(); frmDangKy close = new frmDangKy(); open.Show(); close.Hide(); close.Visible = false; }