Big IP LB and MS Web Deploy

Hi - I'm working on using MS Web Deploy to push new builds to several IIS servers. We use Big IP Load Balancer and want to create a script that that will check a given IIS server for current connections, stop new connections from being established, and then once current connections have ended stop new connections from happening. Then at the end of the script start to allow connections again. Any insight as to how I can accomplish this would be awesome!