You can print the current page by adding a form button and setting its 'onclick' attribute to

javascript:window.print();

To configure the button so that it only appears on the screen, not on the printed page, add a '@media print' CSS rule that sets the 'display' property to 'none'.

Download the attached *.wpp file, open it in WPX8, right-click on the 'Print this page' button and choose 'HTML Source...' to view the code.