open window to a tab?

[uberfuzzy]

if it helps, what i'm trying to do is make 2 buttons (well, theyre gonna be clear overlay buttons overtop some text, but thats not the issue)

one that opens the AA window and brings up the KoS tree,
and another the opens the AA window and brings up the EoF tree

i cant figure out how to set a tab to be the active tab.
the whole TabSource TabPages TabPane thing is kinda weird.

is it .Activate or .Activated or .Selected?

any insight is appreciated from those of you who know far more then i about this evil twisted system