Changing of SuperTabItem by code

Question

I have two SuperTabItems in a SuperTabControl. I want to change from SuperTabItem1 to SuperTabItem2 clicking a button.

I'm using DotNetBar components. The function of a SuperTabControl is the same as a TabControl in the normal objects of Visual Basic. But it looks like the code doesn't work the same for these Tab objects.

I tryed this and many other types of lines, but nothing:

SuperTabControl1.Select(stAsignar)