does this help?

"hit.entity ENTITY* pointer, or NULL when a level surface was hit."

http://www.conitec.net/beta/hit.htm

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt