Hi Alessandro Bacciottini,
Thank you for contacting Syncfusion support.
Query 1: “My main form is a RibbonForm with dockingmanager. I dock tabbed document (UserControl) with function dockingManager1.DockAsDocument(control) and I'm able to tab multiple documents. This is the right way to do that or i need to use tabbeMDIManager?”
We can able to achieve this requirement in both the ways, Because using the both control we can view the multiple tab documents.
Query 2: “the possibility of inserting an icon next to the name of the tabbed documents”.
We can able add icon next to the name of the tabbed Documents in the TabbedMDI control. Please refer to the below Ug Document for further references.
Regards,
Anirudhan