[Bomber]

So, i have this code:

pawn Код:

if (IsPlayerInAnyVehicle(playerid) && GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
  {
  if (newkeys & KEY_CROUCH)
  {
  new Float:xx, Float:xy, Float:xz;
  GetVehicleVelocity(GetPlayerVehicleID(playerid), xx, xy, xz);
  SetVehicleVelocity(GetPlayerVehicleID(playerid), xx, xy, xz + sf);
  return 1;
  }
  }

How can i make a command what disabled/enables it ?