Copy of a GtkDialog widget?

[Andreas Sommer <AndiDog web de>]

Is it possible to deep-copy widgets? For example, I design a dialog in 
Glade but want to use it simultaneously (by multiple threads at the same 
time) in multiple variations (changed label texts, ...). So can I create 
copies 'A' and 'B' and display both of them at the same time?

Hope that makes sense ;-)

Best regards