Object to follow mouse cursor in UI layer

[DJVDJV]

Make object to follow mouse cursor in game is pretty easy:

Vector3 pos = Input.mousePosition;
transform.position = Camera.main.ScreenToWorldPoint(pos);

But I don't fully get how to make object to follow mouse cursor in NGUI?

I tried make it as in NGUI Tooltip (Just updating position every frame).. but I don't fully get idea.

So:
What is short (And right) way to make object to follow camera in NGUI?

[ArenMook]

Use transform.OverlayPosition.