Changing table layout at runtime

I've created a table at design time which is mapped to a model. Later at runtime I want to dynamically add different columns from this model to the table and bind them.

The object IWBTable offers several methods to manipulate the table layout including binding columns to models. But at runtime I can't manage to get access to the runtime table instance. Is it possible to get access to that object at all? If not how can I manipulate the table layout at runtime without manipulating the model?

Best regards,

Christian