d tostring.  Convert a real value to a string 
d Program by Jeremy Wernow, Stata Corp
d            <jbw@@stata.com>.
d            Nicholas Cox, University of Durham, U.K. 
d            <n.j.cox@@durham.ac.uk>
d Statalist distribution, 22 March 2000.
d 
d Converts real values to strings, keeping format and/or
d value labels if desired

f tostring/tostring.hlp
f tostring/tostring.ado