Hi Cetin,
>Update: Makes sense when I read the help :
>"You cannot subclass or add custom methods and events to the Empty class"
If you need very similar empty based objects (which you normally would put in an inheritance tree) there is an OOPish way: you can put the code to *create* the empty object in a class, and put the "special" calls to addproperty in a subclass. Where to use: if you want bus objects updating only parts of the table.

my 0.02 EUR

thomas