I've done close to nothing with OOP, but find it interesting. I'm wondering what the structure of an object is, as generated by the compiler. I'm thinking that it starts with a structure that has public variables and pointers to public functions. You'd call the functions by following these pointers. When a new object is defined based on an existing one, this structure is copied, inheriting the pointers to the old object's functions. Then new functions can be defined in the new object and the pointers in the new object are overwritten with pointers to the new functions. So, is this ANYTHING like what really goes on? Thanks! Harold -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist