Nothing. I don't want to update the code in the objects once created, just that I couldn't enter it into an embedded textbox during initialization the same as I do with normal objects. Instead a dialog should be provided to enter the code snippet an then pass it to the object constructor. Or alternatively code should be allowed to change so that I can enter it afterwards. I can't see another option.

Thank you for your answers, have been very valuable.

Cheers,
Carlos