Hi Steve,
I have created a test sample as per your specifications and it seems to be working fine. Note that the Modifiers for the controls/BarItems/Bars added to the base form should be Protected or Public. Also the application needs to be rebuilt before these changes are visible in the derived form in the designer. Please refer to
test sample attached and let me know if I have understood your requirements correctly. If not, kindly modify the sample to show the problem and send it back to us so that we could investigate this issue here. We appreciate your patience and cooperation.
Regards,
Guru Patwal
Syncfusion, Inc.