You can, but should you?
Don't forget that your users might be using other applications at the same
time that they're using yours.
Don't forget that your users might have vision issues that require them to
use a specific resolution.vbn
If you were to write an application that changed my screen resolution, I'd
quickly scrap it.
Far more appropriate, in my opinion, is have your application resize itself
to accomodate the current resolution.
If you do have a legitimate need to change the resolution, check out what
Randy Birch has at
http://vbnet.mvps.org/code/enums/enumdisplaychange.htm
(Obligatory warning: Randy's site is aimed at VB programmers. Since there
are significant differences between the controls available in VB forms and
in Access forms, some of his samples will not port directly to Access. I
haven't looked that closely at this specific example, so I can't comment as
to whether it'll port unchanged. However, the underlying code should give
you an idea of what needs to be done.)