Point in Polygon WINDING without GDI

Further to our recent postings this group I've now prepared an
effective implementation of this and put it in the public domain at
<www.vanyka.co.uk>. These are source files and should compile in
Delphi 4 and above. Actually our app includes both WINDING and
ALTERNATE hits. For the ALTERNATE hit we give an elegant
implementation by Thrse Hanquet also in the public domain. The whole
thing might be a useful resource for instructors etc.