Hi Arthur,
Thanks for your sample. When MainForm is a MDI Container, MergedBars are used instead of original Bars.This is because of Bars from different MdiChild forms can be merged to a single Bar.
Therefore, you should get hold of the Bar''s MergedEquivalent to access it. Refer the attached sample.
Sample_CmdBar_Test.zipPlease let me know if you have any questions.Thanks for using Syncfusion products.
Regards,
K.Saradha Devi.