No, you can't change the screen size for Access alone, this is a
Windows function.  It isn't hard to switch the screensize in Windows
and switch it back when you are done.  Right-click on the desktop,
select Properties, and then Settings.
As far as the code goes, you will have to take ownership and write it
yourself.  In my experience code rarely works until you understand how
it works.  A single spelling error in 1000 lines of code could
invalidate the whole thing.  If you didn't write it, how would you
find the one spelling error, or even know if there was one?  If you
don't know what every character is supposed to do, how can you rewrite
it to work with your system?  Buy a book, learn the basic syntax,
study the help files, search this newsgroup for examples of each
function, start with something simple and build from there.  If you
have specific questions (that you have already tried to satisfy
through normal channels), then ask away. We like to encourage the next
generation of programmers.