[texhax] visibility of variables through \rput

[Brandon Kuczenski]

Hi TeXers,

I have encountered a difficulty with using custom commands from inside 
\rput.  When the commands define new macros, those macros aren't visible 
from outside the \rput.  In the example below, the command defines 
\theresult-- the first reference to \theresult works; the second reports 
an "Undefined control sequence".  Is there any way to make the results of 
the computation visible outside of the \rput scope?

\documentclass{article}
\usepackage{pstricks-add}
\usepackage{fp}

\newcommand{\compute}[2]{%
   \FPmul\theresult{#1}{#2}
   \theresult
}

\begin{document}
\begin{pspicture}(0,0)(5,5)

\rput(2,2){\compute{0.4}{0.377}
   \rput(10,0){\theresult} % this one works fine
}

\rput(10,5){\theresult}  % this one gives an error

\end{pspicture}
\end{document}

Thanks in advance,
Brandon