Text box with rounded corner

Hi – I like the flexibility of defining the corners in the “Button” element. But I could not find the same flexibility in the content box. When using non-Highend elements, the alignment is going out of whack.

I would like to put a box where I can define the corners, background and foreground color, and it should be clickable only when I want. How can I do that?

Thanks,
-Roli