Help to add a Tab on the Ribbon

Hi,

New to BricsCAD. Just compiled the demo .net project. Now How do I add an new Tab and link the Smap01 function to a new Button on the new Tab?

This thread says RibbonSplitButton could be used.
https://forum.bricsys.com/discussion/comment/47686#Comment_47686

I searched RibbonSplitButton in AutoCAD and found this example:
https://spiderinnet1.typepad.com/blog/2012/06/autocad-cui-ribbon-net-create-ribbon-split-buttons-into-ribbon-panel.html
Is it a good start to modify with?

Regards,

Cean