>if i have a database and tables stored in a folder how can i prevent any body from doing a simple thing like
>
>use (table name)
>browse
>
>or something similar

If all you want is that simple then use DBC events. Enable the events and create a simple procedure. ie :

-open data testdata
-modi data and right click, select properties, set events on
-Dblclick OpenData to get code window
-Enter some code

PROCEDURE dbc_OpenData(cDatabaseName, lExclusive, lNoupdate, lValidate)
return type('m.WhoIsIt')='C' and m.WhoIsIt == 'MASTER'
endproc

Cetin