Here is a link to detect Apoptotic cells using FACS method and three different Ab's: Hoechst, TUNEL and combination of Annexin V and 7-AAD.
This link comes from the:University of Pennsylvania
School of Dental Medicine
Here are some more links for those who dose not know about:
Annexin: http://www.bdbiosciences.com/pharmingen/protocols/Annexin_V_Staining.shtml (this is also a protocol for the staining of Annexin V.