Hi
Matthias,
Thanks
for using Syncfusion products.
We
would like to let you know that, RibbonMergeContainer can be loaded from MDI
Parent/Child supported container. In UserControl MDI parent child option is not
available by default. So it will be needed to load RibbonMergeContainer in
Form. Please refer below MSDN link update given on [March 7th,2010].
Link
: https://social.msdn.microsoft.com/Forums/sharepoint/en-US/8de499e4-d5cf-4ec3-9483-f3703e454f0f/how-to-create-a-mdi-parent-form-within-a-mdi-parent-form?forum=winforms
Please
let us know if you need further assistance,
Regards,
Senthil