My question is pretty same as the following one:
I followed the demo "TabStrip / Load on Demand RadPageView" and i can say that most of the code is missing so i had to combine the code from the other demoS in order to achieve what i want (please refer the code below).
However the thing is that i can't make it loads the very first pageview when tabs are created. After you click another tabpage it works as expected.
It is something similar to windows button control which has a "PerformClick" event.
CODE BEHIND (VB.NET)