PARSO dealt with the issues of controlling the menu bar, icon bar, pop-up menus from right-click, etc.
There is also the issue of securing your database using Workgroup security.
Since I don't know exactly what you want to do, my best answer here is to say that it is possible with workgroup security to limit a person's ability to create a new form, report, etc. The "real" way to do this is
1. Look up "Startup Form" as a way to bring up a "Switchboard" - these topics are in your help files.
2. Using Workgroup security, prevent folks from entering Design view on what you've built.
3. Search this forum for topics: Workgroup security; hiding the database window; switchboard forms;
After that, if you have specific questions, you can always come back for more.