3. The system according to claim 2 , wherein the COM add-in is configured to generate a tool bar for the multi-level interface client in the at least one productivity client.
3. The system according to claim 2 , wherein the COM add-in is configured to generate a tool bar for the multi-level interface client in the at least one productivity client. 4. The system according to claim 3 , wherein the tool bar comprises at least one button operable to invoke the GUI layer.