Controls the issuing of warning messages for the inconsistent use of the class and struct keywords.
#pragma warn_structclass on | off | reset
If you enable this pragma, the compiler issues a warning message when you use the class and struct keywords in the definition and declaration of the same identifier.
class X; struct X { int a; }; // WARNING
Use this warning when using static or dynamic libraries to link with object code produced by another C++ compiler that distinguishes between class and structure variables in its name " mangling."