How to create a filter module

I've looked everywhere but I can't seem to find a module to filter my products. Can someone link me to a tutorial or explain me how to do this please?

What do you mean by filter ?
ther eis a specific forum on hikashop forum about filter /search .
www.hikashop.com/forum/filters-search.html
hikashop.com/support/support/documentati...-filter-listing.html
www.hikashop.com/support/documentation/1...-filter-listing.html
it is implemented on ly in the bussiness version .
hope it ll help
regard's