#if wxUSE_EXTENDED_RTTI
const int wxInvalidObjectID = -2 ;
-const int wxNullObjectID = -1 ;
+const int wxNullObjectID = -3 ;
// Filer contains the interfaces for streaming objects in and out of XML,
// rendering them either to objects in memory, or to code. Note: We
// Reads the component the reader is pointed at from the underlying format.
// The return value is the root object ID, which can
// then be used to ask the depersister about that object
+ // if there was a problem you will get back wxInvalidObjectID and the current
+ // error log will carry the problems encoutered
virtual int ReadObject( const wxString &name , wxDepersister *depersist ) = 0 ;
private :