hi cetin, thanks for you reply.

i'm not really familiar with this code:

PROCEDURE dbc_BeforeOpenTable(cTableName)
If Upper(cTableName)=='EMPLOYEE'
  return Type("m.CanOpen")='L' and m.CanOpen
endif 
ENDPROC

i don't want users to mess up with my tables, how can this solve my problem? can you help me?