There's sample code to do this in Access Developer's xx Handbook by Litwin,
Getz and Gilbert et al (where xx is whatever's appropriate for the version
of Access you're using). You can learn more about their books at
http://www.developershandbook.com/
They've also produced an MDE version of the code that you can download from
http://www.developershandbook.com/downloads.htm and use in your application.
Another option is to purchase ShrinkerStretch from Peter De Baets
http://www.peterssoftware.com/
There's also code at http://jamiessoftware.tk/resizeform/rf_download.html
but I don't really know anything about it.

Signature
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)
> Do members of this list have suggestions as to the best way to make sure
> that Access runtime programs maintain their original proportions as they are
[quoted text clipped - 8 lines]
>
> Steve Hays