Your question is slightly confusing, however these examples should help you out. I'll include both methods that use $eval and [ ].

%Myvar. [ $+ [ %var1 ] $+ . $+ [ %var2 ] ]
$eval($+(%,Myvar.,%var1,.,%var2),2)
%Myvar.var1.var2

% [ $+ [ %var1 ] $+ [ %var2 ] ]
$eval($+(%,%var1,%var2),2)
%var1var2

Good Luck.
- Raccoon


Well. At least I won lunch.
Good philosophy, see good in bad, I like!