Is it possible to show two forms at the same time?

When I run my program it only shows the QueuingForm.frm, But the thing is i want it to show both QueueForm and CahsierWindowsForm

Here is the little part of the code: 

{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    Application.Run(new QueuingForm());

    Application.Run(new CashierWindowsQueuingForm());
}