[Facebook Flash Graph API]How to get PID from the POST result.

Question

I am using Graph API to upload photo to the facebook via flash application. I am able to upload it but what I am trying to do is to get pid of the photo I have uploaded.

Facebook.api('/me/photos', handleUploadComplete, values,'POST');

This is the code that im using and once 'POST' is done, I know that it returns results to 'handleUploadComplete' function. how can i get the pid from that result?

please help.