Each MDI/MDIHelp window defines an mdirbb_1 object by default in the window's source code (similar to mdi_1 and mditbb_1).
When a menu is converted and displayed as a ribbon bar, that ribbon bar will be bound with the mdirbb_1 object.
The definition of the mdirbb_1 object in the MDI window is like below:
(Note that the mdirbb_1 object inherits from the RibbonBar control, therefore it has the properties, functions and events of the RibbonBar control. But it cannot have user-defined events or functions.)
Note
If your code checks the existence of all controls in the window, for example, if your code calls the "of_setcontrolstatus" method of the "pfc_n_cst_security" object in the PFC framework, make sure you have modified the code to check mdirbb_1, or upgraded your PFC framework to the latest version, otherwise you may encounter this error: "Unknown control mdirbb_1".
