template_preprocess_HOOK: what do I put for HOOK?
The HOOK corresponds to the theme function or template you are preprocessing.

If you wanted to alter page.tpl.php, you would use function MYTHEME_preprocess_page(&amp;$variables).

If you wanted to alter theme_item_list(), you would use function MYTHEME_preprocess_item_list(&amp;$variables).

A note, any dashes should be converted to underscores.

So views-view.tpl.php would be altered by function MYTHEME_preprocess_views_view(&amp;$variables).