The "Full Screen" option in Authorware never works how you expect. You want it to center your course on screen, but all it ever does is place it top-left. Hardly anyone ever uses that option for that reason.
Personally, I choose an appropriate fixed window size and stick to it. I run it as a standalone window that the user can drag around the screen as required. If you try to run your teeny little 1024x600 content on my 1920x1200 monitor in the way you described, it will have a massive frame around it and look worse than if you just run it in its own window.
As Steve indicates, it's not easy.
Authorware doesn't 'scale' like Flash does.
You could do what you want by detecting the screen size and change the size of the Presentation window by using the ResizeWindow function.
That'll change the size of the 'stage' but all your content will still be fixed where it was before, likely top-left just as the 'fullscreen' option works (or doesn't work as the case may be).
Now most all elements can be placed via custom x/y coordinates. So you *could* base every element's position on the size of the presentation window itself. However, that's surely complex even for a fairly basic piece.
The more common approach was to use the cover.u32, or the subsequent RGBcover.u32 (see http://www.awaretips.net) to 'black out' any of the desktop that the presentation window does not cover - making it look somewhat full-screen...though everything in the window is still at its default size and placement...but at least it's centered.
I think cover.u32 stopped working on XP though RGBcover.u32 still does....I could be wrong in that recollection though.
Otherwise, Authorware is just built to deliver to a set size. There are workarounds but definitely none as easy as a simple scale.
Steve and Erik are correct but I have a bit of code you might find that works. It’s based on using a memo box from WinCtrls.u32, it seems to work for me but if you author using more than one monitor you must limit yourself to one while you publish. You can go back to two monitors and the EXE will run OK but only display on monitor ONE.
If you drop me an email to neill(dot)jackson(at)talk21(dot)com I will send you it (I can't add it here coz it's an A7P). It’s only 29k, you will need to add your own content though.
DRAW A MEMO BOX.a7p.zip 6.1 K
OK it did add it! :-)