call in Fortran code

From: Huajun Fan <fan |-at-| mail.chem.tamu.edu>
Subject: call in Fortran code
Date: Tue, 14 Mar 2000 15:58:11 -0600

Dear CCLers
 I wonder if the fortran code can call a excutable file, instead of a
 source code.  If so, how can I do it? Any advice will be highly
 appreciated.
 Thanks in advance.
 huajun