Hi,
How do you make this work ?

--- mpframed.tex ---

%\def\myFrameAlternative{line}
%\def\myFrameAlternative{dashes}
\def\myFrameAlternative{dots}

\startuniqueMPgraphic{name}

path p ;

p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
 show (\myFrameAlternative) ;

if \myFrameAlternative = dashes :
% if (\myFrameAlternative) = dashes :
draw p dashed evenly scaled 2 ;
% elseif (\myFrameAlternative) = dots :
elseif \myFrameAlternative = dots :
draw p dashed withdots scaled 2 ;
else :
draw p ;
fi ;
\stopuniqueMPgraphic

\defineoverlay[myGraphic][\uniqueMPgraphic{name}]

\starttext

\framed[%
offset=5mm,
background=myGraphic,
frame=off]
{mp framed}

\stoptext

---

context.cmd mpframed

-- 
Alan