3D widget serverlist?

I wann to know is It possible to add a serverlist in a scrollbox of an 3D widget? So when i create a Server that the Client can find It in the 3D widget? In 2D i got It to work but in 3D it wont appear.
Can someone help me?

The simple question is

Is It possible to add a child widget in a 3D widget what Shows when i want?