\starttext

\startMPpage
   label(btex \ruledhbox{xxx} etex ysized 5pt,origin);
\stopMPpage

\startMPpage
   label(btex \ruledhbox{foo bar} etex ysized 5pt,origin);
\stopMPpage

\startMPpage
   label(btex \ruledhbox{no top skip test} etex ysized 5pt,origin);
\stopMPpage

\stoptext
