Add Custom Group to Existing Ribbon

Mar 4, 2016 at 11:37 AM
Hello, I want to ask 2 questions:
1) I have custom list form page on which i add new EasyRibbon Tab with some button groups. Than I have customcontrol on which i want add new button group in this Button Tab. How can I do this? I not found any appropriate method.

2) There is RibbonCustomAction class, which have overloaded method Provision. You can Provision custom action to web, site or list, but you can't provision to content type. But there is using RegistrationType - ContentType, with "0x" content type in Provision method (RibbonCustomAction.cs)
                customAction.RegistrationType = SPUserCustomActionRegistrationType.ContentType;
                customAction.RegistrationId = "0x";
Why is there not method with SPContentTypeId parametr to provision custom action to custom Content Type?

Thanks for answers
Mar 4, 2016 at 11:50 AM
Mar 4, 2016 at 11:56 AM
Yes, I've read this links. There is method "AddRibbonTabToPage", but not method like "AddGroupToRibbonTabToPage".
And second question about code - not about API