Accessing the designer generated Bar or ParentBarItem components through code and modifying them may not have any effect. Instead of that it is better to get hold of a Bar’s "Merged Equivalent" which is internally created by a merge of the MDIParent’s Bar and all the MDIChildren, if there is any. Please refer the below code snippet which illustrates this:
Dim bi As Bar=Me.mainFrameBarManager1.GetMergedEquivalent(Me.bar1,Me.bar1)
There is also a shortcut, MainMenuBar property exposed in the MainFrameBarManager that will provide easier access to the merged main-menu-bar.
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