private void btnAbout_Click(object sender, EventArgs e)
{
DialogResult Logout = new DialogResult();
string strLogout = "Bạn muốn đăng xuất?";
Logout = MessageBox.Show(strLogout, "Quản Lý Khách Sạn", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
if (Logout == DialogResult.Yes)
{
frmDangNhap DN = new frmDangNhap();
DN.Show();
this.Hide();
this.Dispose();
}
}
private void dangnhapToolStripMenuItem_Click(object sender, EventArgs e)
{
frmDangNhap child = new frmDangNhap();
child.MdiParent = this;
child.Show();
}