Views single field themeing with custom variables How do I pass a variable from a preprocess hook to a template file for a single field, that is view files starting with 


  views-view-field--


I want to know what are the preprocess functions that can be used for this purpose. Because, whenever I try to set a variable using hook_preprocess_views_view_fields it is only renderable at sytle/row level, but never at single field level.

Hope Im clear with my query. Any help appreciated.
I think it's just that there are two similarly-named theme implementations: views_view_field and views_view_fields (trailing s). Generally you can take the name of the template file before the first double-dash to find the theme implementation name, so if the template starts with views-view-field-- you'd expect the preprocess to be hook_preprocess_views_view_field(). (That naming pattern's not guaranteed though.)