by doing an Advanced Search on www.groups.google.com in group
microsoft.public.access*
on the words "disable mouse wheel"
you come up with a whole bunch of NG posts, many of which give basically the
same answer as the following post at

http://groups.google.com/group/microsoft.public.access.modulesdaovba/browse_frm/
thread/b2a69dc769d8daed/a29b41804d5f6387?lnk=st&q=disable+mouse+wheel+group%3Ami
crosoft.public.access*&rnum=7&hl=en#a29b41804d5f6387

hth