I read this question to ask whether users can be prevented from entering
data directly into tables, and be required to enter data into the table only
by way of the bound form.
To the OP, my best guess about your question is that when users open the
database they see what is called the database window, with tabs for Tables,
Queries, Forms, etc. As it stands they are selecting the table itself
rather than the form. The way to prevent that is not to give them the
option. Go to Tools > Startup and make your data entry form the Startup
form. There are various Startup options to prevent the use of special keys,
prevent the use of the shift bypass key, and so forth. You have to decide
the level of restriction. For instance, you could decide to allow users to
use F11 to open the database window.
*Be sure to make a copy before you make the changes, or you could lock
yourself out*
There are usually ways to get around being locked out, but why give yourself
the hassle?
If the users need to use several forms or reports you could add buttons to
your Startup form to let you open other forms or reports. You could also
use a separate switchboard as the Startup form. You could create the
Switchboard either by way of the Switchboard Manager or by creating your
own Startup form, with buttons to navigate through your database.
Since I am guessing a bit as to the exact meaning of your question, I will
not try to add any more detail just now.