Well, I didn't put all the functions and all the variables of the classes. Also I didn't type case to simplify the code (I'm just too lazy to type case over and over. it's past my working hour and I'm rather reluctant to do anything beside going to bed. ). Okay so to put it bluntly, I'll change my question to: How do I make 2 objects from 2 different classes that can know each other's change of value?Originally Posted by CornedBee