The Holiness Movement in the 20th century separated themselves from the newly formed Pentecostal Movement over the doctrine of holiness and also over tongues.
In the HM, baptism of the Spirit was the crisis whereby a man is entirely sanctified and not about giftings though they are frequently given as well. Pentecostals today like to think they came out of the HM but they have more in common with the spiritual manifestations of non Christian religions.
Sanctification is both a process and an event but the event must take place in this life. There is a process leading up to it whereby a man usually comes to a place of utter failure in his walk, as he has not learned the power of the cross in separating him from his sin nature.