By default, each MDI/MDIHelp window automatically defines an mdirbb_1 object and an mditbb_1 object in the window's source code (similar to how mdi_1 is defined). The mdirbb_1 object is used for the RibbonView support, and the mditbb_1 object is used for the TabbedView support.
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 mditbb_1 and mdirbb_1 as well.
