You can actually perform this without using JLink or the Visual Basic API. If you have some imagination and knowledge of mapkeys, you can write this kind of thing in Perl or python. You could probably write a script driven by a webpage running Javascript. You could also probably do something like this with a DOS script.
The key is to distill the commands you need down into their simplest form and use one of those programming languages to create a script. Creo or Pro/E then executes that script as a Trail File. This, in turn, creates your geometry.
In the mid-1990's I wrote an incredibly complex series of perl scripts to perform all sorts of modeling tasks in Pro/E and that was way back in the "early days" of the software. You can certainly perform these same tasks faster and better using today's modern programming languages. You'll probably have a better shot using scripting languages other than the JLink, Weblink, or VB API's provided with Creo. Those can be tricky for novices. Scripting is pretty straightforward and it can be easier to get a simple script to execute than a more complex API-based solution.
Thanks!
-Brian
