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Precompiled code is stored in a file called a precompiled header when you
use the precompiled header option ( /fh or /fhq) on the command line.  The
/fh option causes the compiler to either create a precompiled header or use
the precompiled header if it already exists.  The /fhq option is similar but
prevents the compiler from issuing informational or warning messages about
precompiled header files.  The default name of the precompiled header file
is one of WCC.PCH, WCC386.PCH, WPP.PCH, or WPP386.PCH (depending on the
compiler used).  You can also control the name of the precompiled header
that is created or used with the /fh=filename or /fhq=filename ("specify
precompiled header filename") options.

Example:

     /fh=projectx.pch
     /fhq=projectx.pch