win32(95/98/NT/2k), fullscreen/windowed

parameters:
 -d            : use Fullscreen mode(DDraw) (default)
 -w            : use Windowed mode(GDI)
 -6            : forces 640x480 resolution with ddraw(ugly result with GDI)

during the demonstration the following keys are available:
 S             : screenshot(saved as chickleg.tga)
 ESC           : terminate the demonstration
 Q and q       : terminate the demonstration
