>This brings up an interesting point (at least to me).
>
>The default behavior for parameter passing is by value unless specified. What happens when you pass an object to a function in the () like:
>something = myfunc(myobject)
>
>Is myobject passed by reference and therefore all the changes I make to it are reflected in the passed copy? Or do I have to explicitly pass it by reference using the @? Or do I have to return it after the changes are made?
>myobject = myfunc(myobject) will effectively remake the object.

The object reference is passed; any changes to the object state are reflected in the object passed (that's the whole idea of passing a this or thisform reference as a parameter.) It does not make a local copy of the object. Ifyou change properties (or add properties) the changes are made to the object you reference...