Iseries: display form on screen AND button to print the form

Is there a programming method using an AS/400 (Iseries) to display a form on
a screen?  For example an invoice form.  The form must have typical form
elements, such as horizontal & verticle lines, a logo, various font sizes,
and a bar code or two.

On top of these requirements, I want to give the user the option of printing
the form.  It must print as a good-looking document, not a "print-screen"
type document.  ie the program must do a good job of placing lines, various
font sizes, and bar codes in the proper places on an industry-standard (HP)
printer.

I have seen products like ACOM and Create!Print - I know they can handle
reports.  Can they also display the form to a user on a screen?

How can I do the above natively from RPG (or any language) on the AS/400 in
a native fashion?  ie so I can program neatly as opposed to creating a spool
file with font change codes that run thru another processor?

I would like to use a browser so anyone on the internet can display and
print reports. Is this possible?

What tools are available in the AS/400 world to accomplish these basic
functions that I see in so many non-AS/400 web pages.

Thanks in advance for any info!!