PHP snippet to get current node votes

Hi

I'm using votingapi with fivestar and I'd like to get the current node average vote in a numeric form to do some manipulation with it. Looking inside the module it seems I have to use votingapi_get_voting_result($content_type, $content_id, $value_type, $tag, $function) function but I'm getting nothing from it. The parameters I'm using are:

• $content_type = 'version' ...wich is right
• $content_id = NID?... I'm using $node->nid with it but I'm not sure if it's right
• $value_type = 'percent' since I'd like to obtain a integer between 0 and 100
• $tag = I don't know what should I use... votingapi?
• $function = 'average' because I want to obtan the average value for all votes

What should I do to finally get the average value of the votes?

Kind regards and thanks in advance.