If the small blind raises to 2bb's or more (that's the smallest 'raise' allowed Preflop by first to act heads up) then that counts as a steal - so if a player raises 5 buttons and just calls (completes the small blind) 5 times his SB Vpip will be 100 and his steal will be 50
The stat for when flop chkd through and BB leads turn is called 'probe turn' in PT not sure what in Hem