private void btnLogIn_Click(object sender, EventArgs e)
{
// hide this form and show the main menu
frmMainMenu mainmenu = new frmMainMenu();
this.Hide();
mainmenu.Show();
}
private void btnMainMenu_Click(object sender, EventArgs e)
{
// return back to the main menu
frmMainMenu mainmenu = new frmMainMenu();
this.Hide();
mainmenu.Show();
}