First, download 
SYMPHONY-5.2.3 and unpack the archive if it is
required. You now have three options. You can either compile on the
command-line using the automated DEVENV build system or NMAKE utility or you
can use the provided project and solution files. For all of the following
options, first go to the 
SYMPHONY
Applications
USER
MSVisualStudio 
v8 directory.