LOCK UNLOCK PRODUCTION VERSION HOW ?

hi experts ,

goodmorning all ,

can any one tell in production version on which feilds are considering to lock and unlock is done .

actuvally i am prepairing Z transaction for cs02 . so in this i have to set lock and unlock production version .

how can i set this production version lock and unlock .

and also tell me that production vertion and lock unlock fields where these fields are storing ...

thanks all in advance ......