PPWIZARD is a free preprocessor for HTML, REXX, Visual Basic or any text files.
The "<?OpSys>" symbol holds a generic value, this symbol contains a specific operating system name, for example, if the generic operating system was "WIN32" then this symbol might contain:
Note that regina 2.2 beta and earlier versions will not report all versions of Windows correctly so for example Windows 2000 will be reported as "WINNT". To detect "WINXP" requires version 3.0.1 of regina. To detect "WIN2003" requires a yet to be released version of regina.
If the generic operating system was "UNIX" then this symbol might contain:
The value returned by this symbol might be equal to that provided by "<?OpSys>" if we can't get more specific.
This is a Standard Definition which always exists (you don't need to #define it). Note that you can create your own variations or completely new ones (see the examples).