Thanks a lot for it, but suppose i have 5 feilds feild1, feild2,feild3,feild4,feild5 and after the change in the value of feild1 and feild2 the value are calculated and they are reflected automaticaly in feild3, feild4 and feild5 that means feild3,4,5 are dependent on feild1,2 and also feild3,4,5 are read only. i hope you are getting me Matteo
so in this case should i use the same thing which you suggested me