Hi Diego,
We have checked the reported query "I need add a IntegerTextBox and DateTimeEdit controls on RibbonBar. Is it possible to add customs controls to RibbonBar?" Yes, we can use IntegerTextBox, DateTimeEdit and also any custom controls inside the RibbonBar. However, the support for QuickAccessToolBar was not provided for the custom controls and it supports only the RibbonItems.
We have prepared sample with IntegerTextBox and DateTimeEdit. Please find the sample from the below link
Sample:
RibbonAppRegards,
Priyanga B