[NTG-context] aligned text block

What's the easiest way to right-align a left-aligned block of text? e.g. I'd like to set an address as far to the right margin as possible without manual measure of the longest line. I tried \hfill\vbox{some lines}, but that doesn't work. Grüßlis vom Hraban! -- www.fiee.net/texnique/ www.ramm.ch/context/