My disabling button last, is now working. I manage to figure out that the record is the last record. I will post the pseudocode if wanted. thanks, here is the psedocode: check first the property of data source "InsertAtEnd" = yes void clicked() { boolean flag=false; ; super(); record_ds.next(); record_ds.next(); //check if the next record is null If(record.next() == null) // i use strcontrol in my form so if(strcontrol.valustr=="") { record_ds.prev();// button.enable(false); flag=true; } elseif(flag==false)//if not null { record_ds.prev(); } flag=false; record_ds.refresh(); }